Over the past 30 years major advances have been made in the field of organ transplantation due to improvements in surgical techniques and organ conservation as well as optimisation of intensive care and immunosuppressive management. This chapter focuses on important issues in the field of transplant hepatology and may provide helpful information to physicians involved in the care of adult liver transplantion (LT) recipients. It includes indications for LT, current organ allocation policy, pretransplant evaluation, management while on the waiting list, living donor liver transplantation (LDLT) and management of early and long-term complications post-LT.
Appropriate selection of candidates and timing of LT is crucial in reducing mortality and improving outcomes in LT recipients. A patient is considered too healthy to undergo LT if the expected survival is longer without surgery. Therefore, criteria are needed in order to select patients with priority for LT who can most benefit from transplantation. In 2002, the Organ Procurement and Transplantation Network along with the United Network of Organ Sharing (UNOS) developed a system based on the model for end-stage liver disease (MELD) (Table 1) to prioritise patients on the waiting list. In the Eurotransplant countries, the Child-Pugh Turcotte (CPT) score was replaced by the MELD score in December 2006.
The lab MELD score using the three laboratory parameters depicted in Table 1 ranges from 6 (less ill) to 40 (severely ill). It estimates mortality in patients with end stage liver disease within 90 days (Kwong 2015). The MELD score is used for candidates 12 years of age or older and the Paediatric End Stage Liver Disease Model (PELD) score is used for patients <12 years of age. In a large study (Merion 2005) looking at the survival benefit of LT candidates, those transplanted with a MELD score <15 had a significantly higher mortality risk as compared to those remaining on the waiting list, while candidates with a MELD score of 18 or higher had a significant transplant benefit.
|MELD Score =||10x (0,957 x ln [creatinine mg/dL] + 0,378 x ln [total bilirubine mg/dL] + 1,12 x ln [INR**] + 0,643)|
The MELD score does not accurately predict mortality in approximately 15-20% of patients. Therefore MELD-based allocation allows exceptions for patients whose score may not reflect the severity of their liver disease. These exceptions include hepatocellular carcinoma (HCC), non-metastatic hepatoblastoma, adult polycystic liver degeneration, primary hyperoxaluria type 1, small-for-size syndrome, cystic fibrosis, familial amyloid polyneuropathy, hepatopulmonary syndrome, portopulmonary hypertension, urea cycle disorders, hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu disease), hemangioendothelioma of the liver, biliary sepsis, primary sclerosing cholangitis (PSC) and cholangiocarcinoma. Patients with standard exceptions will be assigned a higher MELD score (match MELD) than that assigned by the patient’s laboratory test results (lab MELD). Consequently, this resulted in an increasing proportion of patients transplanted for HCC and other exceptions over time (Massie 2011).
MELD has proved to be accurate as a predictor of waiting list mortality, but has shown to be less accurate in predicting posttransplant outcome (Kaltenborn 2015). For instance, MELD allocation resulted in decreased waiting list mortality; whereas posttransplant morbidity has increased due to transplantation of a higher proportion of sicker recipients with MELD scores >30 (Dutkowski 2011). Moreover, the quality of donor organs has been impaired over the last two decades (Schlitt 2011).
Creatinine values exert a systematic bias against women due to their lower creatinine values conditioning a longer waiting time for an organ (Rodríguez-Castro 2014). Thus women are disadvantaged by use of MELD score in terms of access to LT. The question has been raised whether additional candidate characteristics should be explicitly incorporated into the prioritisation of waiting list candidates (Sharma 2012). It has also been suggested to take into account not only pretransplant mortality but also donor-related factors for estimation of the donor risk index (DRI) (Feng 2006) and posttransplant mortality. Furthermore, standardisation of laboratory assays and variants of MELD including incorporation of parameters such as sodium or cholinesterase have been proposed to overcome the limitations of the current scoring system (Choi 2009, Weissmüller 2008, Vitale 2012).
UNOS made a policy change and revised the MELD scoring system on January 11, 2016. The traditional MELD score is calculated first as an initial score. In those in whom the initial MELD scores is 12 or greater, the score is adjusted by incorporating the serum sodium value. Candidates for LT must have irreversible acute or chronic end-stage liver disease. Hepatitis C virus (HCV) or alcohol-induced liver disease account for the most common disease indications in adults with liver cirrhosis (http://www.eltr.org) (Figure 1). Non-alcoholic fatty liver disease (NAFLD) is a frequent aetiology of liver disease in western countries and is becoming a leading indication for LT in the United States (US). Data from the UNOS and Organ Procurement and Transplantation Network registry from 2004 through 2013 revealed that the number of adults with non-alcoholic steatohepatitis (NASH) awaiting LT has almost tripled since 2004 (Wong 2015).
Other indications include cholestatic liver disorders (primary biliary cirrhosis [PBC], PSC), hepatitis B virus (HBV) infection, autoimmune hepatitis (AIH), inherited metabolic diseases (Wilson’s Disease, haemochromatosis, α-1-antitrypsin deficiency, AAT), NASH, HCC, and acute or acute-on-chronic hepatic failure. In children, biliary atresia and metabolic liver diseases are the most common indications. Contraindications for LT include active alcohol and drug abuse, extrahepatic malignancies, sepsis, uncontrolled pulmonary hypertension, and coexistent medical disorders such as severe cardiopulmonary condition, technical or anatomical barriers such as thrombosis of the entire portal and superior mesenteric venous system. Previous malignancy history must be carefully considered and likelihood of recurrence estimated.
Evaluation of a potential transplant candidate is a complex and time-consuming process that requires a multidisciplinary approach. Requirements for evaluation may differ slightly between transplant centres. The evaluation process must identify extrahepatic diseases that may exclude the patient from transplantation or require treatment before surgical intervention. The protocol we use for evaluation of potential transplant candidates is shown in Table 2.
In cases of recurrent variceal hemorrhage despite prior interventional endoscopic therapy (and non-selective beta-blockade) or refractory ascites, transjugular intrahepatic portosystemic shunts (TIPS) have been used to lower portal pressure and as bridging therapy for transplant candidates. The identification of predisposing factors and the application of lactulose, non-absorbed antibiotics and protein-restricted diets remain essential for prophylaxis and management of hepatic encephalopathy (HE). Moreover, the efficacy of rifaximin, a minimally absorbed antibiotic, is well documented in the treatment of acute HE (Mullen 2014).
Hepatorenal syndrome (HRS) represents a complication of end-stage liver disease and is a risk factor for acute kidney injury (AKI) in the early post-operative phase (Saner 2011, Saner 2012). It is classified into type 1 HRS characterised by a rapid impairment of renal function with a poor prognosis; type 2 HRS is a moderate steady renal impairment. Vasoconstrictors including terlipressin in combination with volume expansion are commonly used and have been shown to be effective for restoration of arterial blood flow and serve as bridging therapy to LT (Hinz 2013). Extracorporeal liver support systems based on exchange or detoxification of albumin have been successfully employed in indicated cases. In case a recipient is on Molecular Adsorbent Recirculation System (MARS) therapy the centre uses the bilirubine and creatinine values measured most prior to initiation of MARS treatment (https://eurotransplant.org/cms/mediaobject.php?file=H5+ELAS+MELD+Oct+20161.pdf). This lab MELD under MARS therapy is valid for 7 days irrespective of the height of the lab MELD. After 7 days, a reconfirmation can be made.
Beyond MELD, other parameters such as frailty and sarcopenia might be essential to consider suitable patients for the waiting list. Sarcopenia is part of the frailty complex present in cirrhotic patients. According to the operational definition by the European Working Group on Sarcopenia in Older People (EWGSOP), the diagnosis of sarcopenia comprises the presence of both low muscle mass and low muscle function in terms of low muscle strength or low physical performance. Muscle wasting is considered one of the major complications of end-stage liver cirrhosis and may be caused by a variety of factors such as reduced nutrient intake, dietary restrictions in sodium and water in decompensated liver disease, reduced protein intake for hepatic encephalopathy, reduced intestinal absorption secondary to maldigestion caused by pancreatic exocrine insufficiency or to intestinal bacterial overgrowth due to small bowel motility disorders and a hypermetabolic state with increased energy consumption and high protein catabolism.
Sarcopenia was highly associated with waitlist mortality and negative perioperative outcome (Kahn 2018; Meeks 2017). This was in particular an issue in patients who were listed with low priority based on a low MELD score (van Vugt 2017).
After waitlisting, laboratory values must be updated according to the recertification schedule shown in Table 3.
|Diagnostic tests (baseline laboratory testing; serologic, tumour/virologic, and microbiological screening; autoantibodies; thyroid function tests)|
|Abdominal ultrasound with vascular Doppler/Duplex|
|Abdominal MRI or CT scan|
|Electrocardiogram (ECG), stress ECG, 2-dimensional echocardiography (if abnormal or risk factors are present: further cardiological screening), Doppler/Duplex carotid arteries|
|Upper and lower endoscopy|
|Pulmonary function testing|
|Mammography (in females >50 years)|
|Physician consultations (anesthesiologist, gynecologist, urologist, cardiologist, neurologist, dentist, ear, nose, and throat specialist)|
|A meticulous psychosocial case review (medical specialist in psychosomatic medicine, psychiatry or psychology)|
|≥25||every 7 days||≤48 hours old|
|24–19||every 30 days||≤7 days old|
|18–11||every 90 days||≤14 days old|
|≤10||every year||≤30 days old|
Special attention regarding specific, disease-related therapy prior to surgery should be given to transplant candidates undergoing LT for HCC or virally-related liver diseases.
The goal of antiviral therapy in HBV patients on the waiting list is to achieve viral suppression to undetectable HBV DNA levels using sensitive tests (Figure 2) (Cornberg 2011, Beckebaum 2013a). Several studies have demonstrated clinical benefits in patients with decompensated cirrhosis with viral suppression as reflected by a decrease in CPT score, improvement of liver values and resolution of clinical complications (Kapoor 2000, Schiff 2007). Moreover, initiation of nucleos(t)ide analogue treatment prior to LT has markedly reduced HBV recurrence posttransplantation.
Due to frequent emergence of mutations in the YMDD motif of the DNA polymerase during long-term lamivudine (LAM) therapy (Beckebaum 2008, Beckebaum 2009), potent nucleos(t)ide analogs (entecavir [ETV], tenofovir disoproxil fumarate [TDF]) or tenofovir alafenamide [TAF], the latter with reduced impact on markers of renal function and bone mineralisation) with a high resistance barrier have become the standard antiviral treatment.
Lactic acidosis has been reported to occur in nucleos(t)ide analog-treated patients (particularly ETV) with highly impaired liver function (Lange 2009). However, more recent studies have found that nucleos(t)ide analogs have been associated with low rates of lactic acidosis and other serious adverse events such as impairment of renal function, osteopenia and osteoporosis (Ridruejo 2012).
Waitlisted patients who have a viral response on antiviral therapy have a better outcome after LT (Picciotto 2007). The combination of direct-acting antivirals (DAAs) (Kumar 2014, Coilly 2016) has been a major step forward in transplant hepatology. NS5A inhibitors (ledipasvir [LDV], daclatasvir [DCV], velpatasvir [VEL], elbasvir and ombitasvir), NS5B inhibitors (sofosbuvir [SOF] and dasabuvir), and protease inhibitors (PI) (simeprevir [SMV], grazoprevir, paritaprevir and voxilaprevir [VOX]) are well-tolerated DAAs for treatment of HCV patients on the waiting list and after LT. Discontinuation of SMV has been announced by the distributing company due to a significant decline in utilisation and the availability of effective therapies, such as pangenotypic combination regimens.
High response rates, improved tolerability and fewer side effects of the new drugs allow antiviral therapy of patients who could not be treated in the interferon era or showed low response rates in interferon-based antiviral therapies. It has to be considered that HCC surveillance remains an issue in cirrhotic patients irrespective of whether a virological eradication was achieved or not.
Coordinators of European Liver and Intestine Transplant Association (ELITA) consensus statements determined serum HCV RNA negative status for at least 1 month before LT as a reliable virological endpoint for prevention of recurrent HCV infection posttransplant (Belli 2017). Data collected by the ELITA showed that antiviral therapy allows for a long-term improvement of liver function and the delisting of one-third of treated patients (Perricone 2018). Risk of liver-related complications after delisting was low. A treatment period of 3 months was recommended as a minimum time period before inactivation and delisting. Process of delisting mainly depends on MELD score, albumin and clinical improvements after 12 weeks of therapy.
Improvement of hepatic function due to successful HCV treatment prior to LT may negate or delay the need for LT in some patients, which is crucial given the scarcity of donor organs and mortailty on the waiting list. Data for primary LT candidates obtained from the Organ Procurement and Transplantation Network database showed decreasing mortality and disease severity in hepatitis C patients on the LT waiting list in the United States (Kwong 2017). Similar developments have been observed in Europe. However, there is a proportion of patients who show no change or worsening of their MELD score despite successful HCV therapy. This may result in lowering the priority of LT (MELD score reduction) without improving quality of life, thereby delaying potentially curative LT. Therefore, robust predictors of improvement in hepatic function and quality of life are currently been investigated to identify patients with decompensated cirrhosis who benefit from DAA therapy prior to LT. El-Sherif (2018) et al. performed a retrospective analysis of data from 4 trials determining the impact of SOF-based therapy in HCV patients with CPT class B (n=502) and CPT class C (n=120). Patient outcomes were tested at 36 weeks. The authors found that presence of ascites or encephalopathy, serum level of albumin <3.5 g/dL or alanine aminotransferase <60 U/L, and body mass index >25 kg/m2 were related with an increased risk of not improving in CPT to class A, independent of SVR. Serum level of albumin <2.8 g/dL and increased bilirubin were associated with a higher risk of LT or death. The authors created a scoring system based on 5 baseline factors (body mass index, encephalopathy, ascites, serum levels of alanine aminotransferase and albumin), called the “BE3A score”, which is significantly related to patient outcomes and may be helpful as a decision-making tool.
Protease inhibitors should not be used in patients with Child-Pugh B or C decompensated cirrhosis. In patients who receive ribavirin (RBV) combination therapy RBV can be started at a dose of 600 mg daily and subsequently adjusted to daily weight-based RBV dose (1000 or 1200 mg in patients <75 kg or ≥75 kg, respectively). Drug-drug interactions are possible with the HCV DAAs, therefore a thorough drug-drug interaction risk assessment is required (www.hep-druginteractions.org).
According to updated European Association for the Study of the Liver (EASL) Recommendations on Treatment of Hepatitis C (2018), patients without cirrhosis and with compensated (Child-Pugh A) cirrhosis without HCC awaiting LT with a MELD score <18-20 should be treated prior to LT with SOF and LDV (genotypes 1, 4, 5 and 6), or with SOF and VEL (all genotypes); whereas those without HCC and a MELD score ≥18-20 should be transplanted first. Patients with decompensated cirrhosis (Child-Pugh B or C) without HCC awaiting LT with a MELD score <18–20 are recommended to be treated with SOF and LDV with RBV, or with SOF and VEL with daily weight-based RBV of 1,000 or 1,200 mg in patients <75 kg or ≥75 kg, respectively for 12 weeks. RBV can be started with a lower dose (600 mg daily) followed by dose adjustment depending on tolerability. Patients with decompensated (Child-Pugh B or C) cirrhosis with contraindications or intolerable to RBV should receive the fixed-dose combination of SOF and LDV (genotypes 1, 4, 5 or 6), or the fixed-dose combination of SOF and VEL (all genotypes), for 24 weeks without RBV. In HCV transplant candidates with HCC, without cirrhosis or with compensated cirrhosis, optimal time point of antiviral treatment (before or after LT) is not clear. Lower SVR rates have been described in patients with HCC treated with regimens including SOF or ombitasvir and ritonavir-boosted paritaprevir plus dasabuvir with or without RBV as compared to non-HCC patients and HCC patients treated after LT (74% vs. 91% and 94%, respectively).
ELITA consensus statements recommend treatment of patients with a MELD ≥21-25 in a case by case decision; and not to treat pretransplant patients with MELD >25 (Belli 2017).
In Solar-2 study (Manns 2016), patients with genotype 1 or 4 HCV disease (pre- and posttransplantation patients with decompensated cirrhosis (CPT class B/C) and posttransplant patients without cirrhosis or with compensated cirrhosis) were treated for 12 or 24 weeks. Serious adverse events were reported in 14% of patients with compensated cirrhosis and 24% of patients with decompensated disease. Approximately one-third with CPT class B improved to CPT class A and 48% with CPT class C improved to CPT class B.
SOF is a backbone for several interferon-free regimens due to its viral potency, pangenotypic activity and high barrier to resistance (Rodriguez-Torres 2013). Treatment of patients with compensated cirrhosis in genotype 1 in phase III trials with either SOF/LDV (Reddy 2015) or paritaprevir/r/ombitasvir/dasabuvir (3D regimen) (Fried 2014) have shown sustained viral response (SVR) rates >90%.
The need for RBV has been discussed controversially and remains to be studied. Addition of RBV is associated with a higher incidence of adverse events and might be of benefit to increase SVR. This may account in particular for decompensated cirrhotic as well as for treatment-experienced cirrhotic patients. For instance, an integrated analysis of patients with liver cirrhosis from the phase II and phase III clinical development programme of SOF/LDV demonstrated that only treatment-experienced patients treated for 12 weeks had increased SVR rates with addition of RBV (SVR: 90% vs. 96%, n.s.). In the TURQUOISE-II study SVR rates of patients with 12 or 24 weeks of treatment and addition of RBV were 92% vs. 96% (Poordad 2014). RBV dose reduction did not impact SVR rates. Genotype 1a patients with prior null-response to pegylated interferon+RBV therapy achieved higher SVR rates when treated for 24 instead of 12 weeks (93 vs. 80%). Of the patients (n=513) analysed in the SOF/LDV trial conducted by Reddy et al. (2015), 69% were not treatment-naïve and 47% had failed previous treatment with a protease-inhibitor regimen. Overall, 96% achieved SVR12 similar to treatment-naïve and previously treated patients (98% vs 95%, respectively). SVR12 rates were 95% in patients receiving 12 weeks and 98% in patients receiving 24 weeks of treatment, and did not vary substantially with or without RBV. In the 3D trial regimen (Fried 2014) IL28B T/T, prior non-response and genotype 1a were negative predictive factors for SVR.
Combination of SOF with DCV+RBV (Ally-I study, Poordad 2016) provided SVR in 82% of genotype 1 cirrhotic patients, and SVR rates were substantially lower (56%) in patients with advanced cirrhosis (CPT class C).
In a phase 3, double-blind, placebo-controlled study, naïve and previously treated patients with compensated cirrhosis (genotype 1, 2, 4, 5, or 6), receiving once-daily SOF-VEL for 12 weeks achieved high SVR rates of 99% (Feld 2015). In a phase 3, open-label study (Curry 2015) CPT class B cirrhotic patients (naïve and previously treated, HCV genotype 1, 2, 3, 4, or 6) were randomly assigned in a 1:1:1 ratio to receive SOF and velpatasvir once daily for 12 weeks, SOF-VEL plus RBV for 12 weeks, or SOF-VEL for 24 weeks. Overall SVR rates were 83% among patients who received 12 weeks of SOF-VEL, 94% among those who received 12 weeks of SOF-VEL plus RBV, and 86% among those who received 24 weeks of SOF-VEL. The response rates were not significantly different among the three study groups. The most common adverse events among all patients were fatigue (29%), nausea (23%), and headache (22%), whereas anaemia (31%) predominantly occurred in patients receiving RBV.
Real world data showed that efficacy, safety, and tolerability have been very similar to those in clinical trials, reinforcing the value of these new DAA treatment options. Results from the HCV-TARGET study (Reddy 2017) evaluating the efficacy and safety of SOF based-regimens in the real life setting showed that the SVR12 rate of the combination of SOF+SMV ± RBV in 140 patients with cirrhosis and a MELD score >10 was 73%. In another recently published real life study (Aqel 2015) investigating a combination of SOF+SMV ± RBV in 119 genotype 1 cirrhotic patients, 78% achieved an SVR12.
SVR rates in treatment-experienced cirrhotic genotype 3 patients were only approximately 60% even in patients treated for 24 weeks with SOF + RBV. In a phase III study (ALLY-3) (Nelson 2015) with a 12-week regimen of DCV plus SOF in genotype 3 patients (treatment naïve [n = 101] or treatment experienced [n = 51]) SVR12 rates were 90% (91 of 101) and 86% (44 of 51), respectively. No virological breakthrough was observed. SVR12 rates were high in patients without cirrhosis (96%), but considerably lower in those with cirrhosis (63%). Clinical parameters such as gender, age, HCV RNA levels, and interleukin-28B genotype did not affect virological response. No adverse events occurred leading to discontinuation, and treatment-emergent grade 3/4 laboratory abnormalities were transient. Patients infected with HCV genotype 3 can be efficaciously treated with the new fixed-dose combination of SOF (400 mg) and VEL (100 mg). In a study conducted by Afdhal et al. (2017) impact of SOF and RBV on hepatic venous pressure gradient (HVPG) was investigated in patients with compensated and decompensated cirrhosis with portal hypertension. 72% of patients (33/46) achieved SVR12. Nine patients (24%) had ≥20% decreases in HVPG during DAA therapy. Four of the 33 (12%) patients with baseline HVPG ≥12 mm Hg had HVPG <12 mm Hg directly after treatment completion. Of nine patients with pretreatment HVPG ≥12 mm Hg who achieved SVR12 and completed 48 weeks of follow-up, eight (89%) had a ≥20% reduction in HVPG.
In a recently published cohort study using the Scientific Registry of Transplant Recipients database from 2003 to 2015 a total of 47,591 adults waitlisted for LT from HCV, HBV, and NASH were identified (Flemming 2017). The authors found that in the era of DAA therapy adjusted incidences of LT waitlisted for decompensated cirrhosis in HCV patients decreased by over 30%, whereas waitlisting for decompensated cirrhosis in NASH increased by 81%. Waitlisting for HCC in both the HCV and NASH populations significantly increased in both the PI and DAA eras (P < 0.001 for all); whereas HCC waitlisting in HBV remained stable.
Levitsky et al. (2016) conducted an open-label, multicentre, phase 2 study involving waitlisted patients with chronic HCV genotype 1 infection who were undergoing a first LT from an HCV negative donor. Patients who were administered previous DAA treatment or who had a creatinine clearance of less than 40 mL per minute at the time of LT were not included. A total of 37 patients were screened, and 16 with a median unadjusted MELD score of 13 were enrolled. Patients received a single dose of LDV+SOF the day they were hospitalized for transplantation and once daily for 4 weeks postoperatively. The primary efficacy end point was an SVR 12 weeks after the end of the 4-week treatment. Results showed that a preemptive therapy in HCV positive LT candidates including a 4-week course of perioperative LDV+SOF was associated with a high SVR rate. There was one patient with a virologic relapse who was positive for NS5A resistance at baseline and had a response to an additional 12 week treatment course.
Fernandez Carrillo (2017) conducted a large, national, non-interventional Hepa-C registry study including patients who started treatment with DAAs while awaiting LT. Fifteen patients who had treatment interruptions around LT were analysed. Of those, 12 were administered interferon-free regimens, predominantly SOF+DAC (8/12), for a total of 24 weeks. Antiviral therapy was interrupted temporarily for a median of 5 (range 2-33) days. A total of 14 patients completing 12 weeks of follow-up achieved an SVR. One patient who died prior to week 12 posttreatment achieved a response at posttreatment week 4. Treatment was generally well tolerated pre- and posttransplantation: Serious adverse events (SAEs) occurred after LT in 2/15 patients (anaemia in 1 patient; pneumonia in 1 patient). The authors concluded that continuation of DAA therapy after transient interruption around LT was highly effective, achieving SVR in all patients who completed 12 weeks of posttreatment follow-up.
Prior to DAA introduction, HCV positive donor LT has shown to be associated with an equivalent patient and graft survival as compared to HCV negative donor LT in HCV positive LT recipients. Availability of DAA may contribute to increase the donor pool using HCV positive organs. However, there is insufficient data about the use of DAA in recipients of HCV positive donor livers. Additionally, more data are needed for different genotypes and use of RBV-free regimens. Any use of HCV positive donors in HCV negative LT recipients may currently be restricted to urgent situations and requires a thorough informed consent.
Based on available data and according to EASL recommendations (2018) the use of HCV-infected organs is acceptable in patients at high risk of death on the waiting list and should not be offered to non-infected recipients with a MELD score <20 if there is no access to anti-HCV therapy.
Under MELD allocation, patients must meet the Milan criteria (one tumour ≤5 cm in diameter or up to three tumours, all ≤3 cm) to qualify for exceptional HCC waiting list consideration. Diagnosis of HCC is confirmed if the following criteria are met according to the German Medical Association (http://www.bundesaerztekammer.de/fileadmin/user_upload/downloads/pdf-Ordner/RL/RiliOrgaWlOvLeberTx2016042122.pdf ): (1) liver biopsy-proven alone or (2) two contrast-enhanced (CE) imaging techniques (CE-magnetic resonance imaging [MRI], CE- computed tomography [CT] or CE-ultrasound [US]) in tumours 1 cm up to ≤2 cm; (3) one contrast-enhanced imaging technique (CE-MRI, CE-CT) in tumours >2 cm; (4) arterial hypervascularisation with rapid venous wash out, displaying contrast reversal in comparison to the surrounding liver tissue in 3-phase cross-sectional imaging techniques Patients are registered at a MELD score equivalent to a 15% probability of pretransplant death within 3 months. Patients will receive additional MELD points equivalent to a 10% increase in pretransplant mortality to be assigned every 3 months until these patients receive a transplant or become unsuitable for LT due to progression of their HCC. The listing centre must enter an updated MELD score exception application in order to receive additional MELD points.
Pre-listing, the patient should undergo a thorough assessment to rule out extrahepatic spread and/or vascular invasion. The assessment should include CT scan or MRI of the abdomen, pelvis and chest. We perform tri-monthly routine follow-up examinations (MRI or CT scan) of waitlisted HCC patients for early detection of disease progression. Underestimation of HCC burden before LT has shown to be frequent despite advanved imaging technologies. This has recently been reconfirmed in a study conducted by Ecker et al. (2018). The authors collected HCC patients who underwent LT after preoperative MRI in a prospective institutional database (January 2003 to December 2013). Patients were subdivided in those "within" or "outside" Milan criteria by both imaging and explant pathologic evaluation. Of 318 patients with HCC meeting Milan criteria by MRI at the time of LT, only 248 (78.0%) remained within Milan on explant examination.
Chalaye et al. (2018) investigated the impact of dual-tracer PET/CT scans (18F-fluorocholine and 18F-fluorodeoxyglucose PET/CT) in 177 patients with HCC on tumour staging and treatment allocation. Barcelona Clinical Liver Cancer (BCLC) staging and treatment proposal were retrospectively collected based on conventional imaging, along with any new lesions detected, and changes in BCLC classification or treatment allocation based on dual-tracer PET/CT. Use of this PET scan was helpful in improving staging of patients' tumours. It enabled identification of new tumour lesions in 21% of HCC patients and modified treatment strategy in 14% of patients.
It has been shown that waiting list drop-out rates can be reduced by the application of bridging therapies such as transarterial chemoembolisation or radiofrequency ablation (Roayie 2007). In patients treated with transarterial chemoembolisation before LT for HCC Response Evaluation Criteria in Solid Tumours (RECIST) have shown to be superior to EASL criteria at 1 month follow-up for predicting long-term survival (Shuster 2013). Transarterial radionuclide therapies such as Yttrium-90 microsphere transarterial radioembolisation (TARE) have been tested for bridging therapy in selected cases (Toso 2010, Memon 2013).
Bridging therapy should be considered in particular in patients outside the Milan criteria, with a likely waiting time of longer than 6 months, and those within the Milan criteria with high-risk characteristics of HCC. Sorafenib has been administered in a few studies before LT to investigate the safety and efficacy of this oral multikinase inhibitor in the neoadjuvant setting (Fijiki 2011, Di Benedetto 2011). A systematic review of the few available studies showed that perioperative use of sorafenib did not improve patient survival and could even lead to a worse prognosis (Qi 2015). Moreover, sorafenib is frequently associated with side effects such as fatigue, weight loss, skin rash/desquamation, hand–foot skin reaction, alopecia and diarrhoea, requiring dose reduction or treatment discontinuation. Accurate discrimination of HCC patients with good and poor prognosis by specific criteria (genomic or molecular strategies) is highly warranted to select appropriate treatment options (Bittermann 2014, Tournoux-Facon 2011). In patients with alcohol-related liver disease and HCC, a multidisciplinary approach and thorough work up of both the alcoholic and oncologic problem is mandatory (Sotiropoulos 2008a).
Between 1988 and 2015, 4% of cirrhosis patients were transplanted due to AIH and 8% due to PBC, based on the data from the European Liver Transplant Registry (http://www.ELTR.org). PSC, accounting for approximately 5% of all transplant cases, is a rather small indication group on the waiting list. According to the Guidelines of the German Medical Association, patients with PSC who fulfill the standard exception criteria receive at listing a match MELD reflecting the sum of 3-month mortality according to lab MELD and a 20% 3-month mortality. A modified version of these guidelines became effective in March 2012: patients will be listed initially according to a 3-month mortality of 15% (equivalent to a MELD score of 22) and then are upgraded every three months following every 10% increase of the 3-month mortality (Modified Guidelines of the German Medical Association; http://www.bundesaerztekammer.de/fileadmin/user_upload/downloads/pdf-Ordner/RL/RiliOrgaWlOvLeberTx2016042122.pdf). The previous point increment applied within the match MELD standard criteria was inadequate, and these revised guidelines more accurately reflect the urgency for LT.
LDLT was introduced in 1989 in a successful series of paediatric patients (Broelsch 1991). Adult-to-adult LDLT (ALDLT) was first performed in Asia where cadaveric organ donation is rarely practiced (Sugawara 1999, Kawasaki 1998). LDLT peaked in the US in 2001 (Qiu 2005) but therafter the numbers declined by 30% over the following years (Vagefi 2011, Carlisle 2012). A decline over time was also observed in Europe, although LDLT activity increased in Asia.
In selected cases, LDLT offers significant advantages over deceased donor LT (Quintini 2013). The evaluation of donors is a cost-effective and time-consuming process. Clinical examinations, imaging studies, special examinations, biochemical parameters, and psychosocial evaluation prior to donation varies from centre to centre and has been described elsewhere (Valentin-Gamazo 2004). Using Germany as an example, the expenses for evaluation, hospital admission, surgical procedure, and follow-up examinations of donors are paid by the recipient’s insurance. Due to the increasing number of potential candidates and more stringent selection criteria, rejection of potential donors has been reported in 69-86% of cases (Valentin-Gamazo 2004, Pascher 2002). The advantages of LDLT include the feasibilty of performing the operation when medically indicated and the short duration of cold ischaemia time. In the absence of a prospective study comparing HCC patients undergoing LDLT vs. deceased donor LT (DDLT), there is no evidence to support a higher HCC recurrence after LDLT vs. DDLT (Akamatsu 2014).
LDLT is associated with surgical risks for the recipient AND donor (Baker 2016). The surgical procedures for LDLT are more technically challenging than those for deceased donor LT. In the recipient operation, bile duct reconstruction has proven to be the most challenging part of the procedure with biliary complications ranging from 15% to 60% (Sugawara 2005).
Regarding donor outcome, morbidity rates vary considerably in the literature (Patel 2007, Beavers 2002, Shiraz 2016). Possible complications include wound infection, pulmonary problems, vascular thrombosis with biliary leaks, strictures, and incisional hernia. A major concern related to LDLT is still donor safety because an operative procedure with potential risks must be carried out on a healthy individual (Baker 2016). Biliary complications are the most common postoperative complication in LDLT and occur in up to 7% of donors (Perkins 2008, Sugawara 2005). Liver regeneration can be documented with imaging studies and confirmed by normalisation of bilirubin, liver enzymes, and synthesis parameters. Morbidity rates are strongly related to the experience of the surgical team and should be performed only by established transplant centres with appropriate medical expertise. The currently reported postoperative mortality rates for left and right hepatectomy are 0.1% and 0.5 %, respectively. Outcome in patients undergoing LDLT is similar if not even better than in those undergoing deceased donor LT (Nadalin 2015).
Cardiac decompensation, respiratory failure following reperfusion, and kidney failure in the perioperative LT setting constitute major challenges for the intensive care unit. Acute kidney injury (AKI) has a major impact on short- and long-term survival in LT patients. For instance, Pulitano et al. (2018) found that AKI was associated with increased risk of early allograft dysfunction and chronic kidney disease stage ≥ 2 posttransplant.
There is no currently accepted uniform definition of AKI, which would facilitate the standardisation of care of patients with AKI and improve and enhance collaborative research efforts. New promising biomarkers such as neutrophil gelatinase-associated lipocalin or kidney injury molecule-1 have been developed for the prevention of delayed AKI treatment (Saner 2012). Moreover, genetic profiling of post-reperfusion milieu showed that endothelin-1 and interleukin-18 serum levels on postoperative day 1 were independent predictors of AKI in multivariate analysis (Pulitano 2018).
Early dialysis has been shown to be beneficial in patients with severe AKI (stage III according to the classification of the Acute Kidney Injury Network) (Bellomo 2004), whereas treatment with dopamine or loop diuretics have shown to be associated with worse outcome. Preventative strategies of AKI include avoidance of volume depletion and maintenance of a mean arterial pressure >65 mm Hg (Saner 2011).
Despite advances in organ preservation and technical procedures, postoperative complications due to preservation/reperfusion injury have not markedly decreased over the past several years. Typical histological features of preservation and reperfusion injury include centrilobular pallor and ballooning degeneration of hepatocytes. Bile duct cells are more sensitive to reperfusion injury than hepatocytes (Washington 2005) resulting in increased serum levels of bilirubin, gamma-glutamyl transpeptidase (GGT) and alkaline phosphatase (AP). Machine perfusion preservation is an emerging technology that limits ischaemia/reperfusion injury associated with preservation and may result in improved outcomes after LT and expansion of the donor pool (Quillin 2018).
Vascular complications continue to have devastating effects. In deceased LT, overall vascular complications such as hepatic artery thrombosis (HAT) have been reported in 1.6-4% of patients. Shiraz et al. (2016) retrospectively analysed the trends observed in vascular complications with changing protocols in adult LDLT (A-LDLT) and paediatric LDLT (P-LDLT) over 10 years. Depending on the era of LT the authors stratified the cohort in Group I (n= 391, Jan. 2006- Dec.2010) and Group II (n=741, Jan. 2011- Oct. 2013) patients. With a minimum follow up of 2 years, incidence of HAT in adults has reduced significantly from 2.2% in Group I to 0.5% to Group II, p = 0.02. In Group II non-significantly more adult patients (75%) with HAT could be salvaged compared to only 25% patients in Group I (p=0.12). Incidence of portal vein thrombosis (PVT) has been remained similar (p=0.2) in the two eras.
Yang et al. (2014) found that independent risk factors associated with early HAT were recipient/donor weight ratio ≥1.15 (OR=4.499), duration of hepatic artery anastomosis >80 min (OR=5.429), number of units of blood received intraoperatively ≥7 (OR=4.059) and postoperative blood transfusion (OR=6.898). After logistic regression, duration of operation >10 h (OR=6.394), retransplantation (OR=21.793) and rejection reactions (OR=16.936) were identified as independent risk factors associated with early HAT. Graft type (whole/living-donor/split), duration of operation >10 h, retransplantation, rejection episodes, recipients with diabetes preoperatively and recipients with a high level of blood glucose or diabetes postoperatively had a higher risk of late HAT in the univariate analysis. Doppler exams of the hepatic artery and portal vein are frequently performed in the early postoperative setting. HAT in the early postoperative period can be managed with thrombectomy. Late HAT with complication of bile duct strictures is managed by interventional endoscopic retrograde cholangiography (ERC) but requires retransplantation in the majority of patients. Early portal vein thrombosis is rare (<1%) but may lead to graft loss if not revascularised.
Primary non-functioning graft (PNFG) may be clinically obvious immediately after revascularisation of the allograft. Early signs of liver dysfunction include prolonged coagulation times, elevated liver enzymes (transaminases, cholestasis parameters) without a downward trend, rising lactate, and hypoglycemic episodes. PNFG is a critical situation and requires immediate retransplantation.
Infections occurring during the first month post-LT are usually nosocomial, donor-derived, or due to perioperative complications (Hernandez 2015). Death within the first year after LT is often associated with bacterial infections. Management of infections due to multidrug-resistant gram positive pathogens represent a major therapeutic challenge in the transplant setting (Radunz 2011).
Overall incidence of fungal infections in LT recipients has declined due to early identification and treatment of high-risk patients. However, overall mortality rate for invasive candidiasis and aspergillosis remains high (Liu 2011).
The clinical symptoms of acute cellular rejection are non-specific, may not be apparent or may manifest as fever, right upper quadrant pain, and malaise. A liver biopsy is indispensable for confirming the diagnosis of acute rejection. High dose corticosteroids (3 days of 500-1000 mg methylprednisolone) are the first-line treatment for acute rejection.
Management issues for the long term include opportunistic infections, chronic ductopenic rejection, side effects due to immunosuppression including cardiovascular complications and renal dysfunction, de novo malignancies, biliary complications, osteoporosis and disease recurrence.
Opportunistic infections in the medium and long term after LT are primarily viral and fungal in origin. Opportunistic bacterial infections are uncommon after 6 months in patients receiving stable and reduced maintenance doses of immunosuppression with good graft function. There is still a need for prospective interventional trials assessing the potential effects of preventive and therapeutic strategies against bacterial and fungal infection for reducing or delaying the development of chronic allograft dysfunction.
Cytomegalovirus (CMV) infection plays an important role in the LT setting (Mumtaz 2014) (Figure 3). CMV DNA assay is the commonly used laboratory tool to diagnose and monitor CMV infection. Current guidelines recommend antiviral prophylaxis over pre-emptive therapy in preventing CMV disease in high-risk LT recipients (CMV-seronegative recipients of organs from CMV-seropositive donors [D+/R-], [Kotton 2013]). The period of prophylaxis should be no shorter than 3 months in D+/R- patients. Delayed-onset CMV disease occurs in 15-38% of CMV D+/R- LT patients after prophylactic treatment for 3 months (Eid 2010).
The procedure in the transplant centres is inconsistent for intermediate-risk (R+) patients. If a preemptive strategy is adopted, screening for CMV every 1-2 weeks in the first 3 months post-LT is not entirely achievable in routine clinical practice in most centres. If prophylaxis is carried out in D+/R+ or D-/R+ patients, this should last 3 months. D-/R- patients have the lowest risk of CMV infection and disease.
A controlled clinical trial demonstrated that valganciclovir, an oral prodrug of ganciclovir, is as effective and safe as intravenouos (IV) ganciclovir for the prophylaxis of CMV disease in solid organ (including liver) transplant recipients (Paya 2004). In kidney transplant patients, it was shown in the Impact Study (Humar 2010) that the incidence of CMV infections could be significantly reduced by lengthening the period of prophylaxis from 100 to 200 days in D+/R- patients (n= 316). However, side effects and financial burden of this prolonged approach need to be considered. In a previously published study (Kim 2015) LT patients experiencing CMV infection were administered oral valganciclovir (900 mg/day) daily or IV ganciclovir (5 mg/kg twice daily) as antiviral preemptive treatment. A total of 83 patients had preemptive antiviral therapy, of those 61 patients received ganciclovir and 22 patients received valganciclovir. The median time from LT to CMV infection in the IV ganciclovir group was shorter than in the oral valganciclovir group (21 days vs. 30 days, p = 0.001). Recurrent CMV infection rates after treatment were 14.8% in the ganciclovir and 4.5% in the valganciclovir group (p=0.277). None of the patients in either group experienced CMV disease. The authors concluded that oral valganciclovir was equally effective as IV ganciclovir in preemptive treatment of CMV infection following LT.
In cases of ganciclovir-resistant CMV disease, alternative therapeutic options include CMV hyperimmune globulins, or in rare cases, antiviral medication (foscarnet, cidofovir or leflunomide) (Eid 2010).
Occurrence of posttransplant lymphoproliferative disease (PTLD) in the first year after solid-organ transplantation is typically related to Epstein-Barr virus (EBV) infection. EBV-seronegativity of the recipient before infection, high EB viral load, intensity of immunosuppression and young age have been reported as risk factors for PTLD (Smets 2002). Outcomes have improved since rituximab has been incorporated into treatment regimens (Kamdar 2011). Therapeutic management options include reduction of immunosuppression, rituximab, combination chemotherapy and adoptive immunotherapy.
Oral reactivation of human herpes simplex virus-1 (HSV-1) after LT is common. Development of varicella-zoster virus (HHV-3) after LT is typically related to intense immunosuppressive therapy and its therapy does not differ from the non-transplant setting.
Human herpesvirus 6 (HHV-6A and HHV-6B) can cause primary or reactive infection in LT recipients and may often be restricted to the infected organ and asymptomatic but it can also display a variety of clinical syndromes, including fever, hepatitis, and higher rates of graft dysfunction. It may have indirect effects including increased risks of mortality and fibrosis as well as hepatitis C progression. Recipients with inherited chromosomally integrated HHV-6 (ciHHV-6) may have an increased risk of graft rejection and opportunistic infections (Phan 2018). HHV-6 and HHV-7 may have a potential role as co-pathogens in the direct and indirect illnesses caused by CMV. HHV-6 infection can be determined by quantifying viral DNA in plasma or blood, however, biopsy remains the gold standard for diagnosis. Clinically significant tissue-invasive infections can be treated with ganciclovir, foscarnet or cidofovir.
There is often a multifactorial pathogenesis for allograft hepatitis in LT patients. It is advisable to incorporate HEV RNA determination into the differential diagnostic investigation where patients have unexplained elevated liver enzymes or histological signs of allograft hepatitis (Borg 2016). Recently, molecular testing was suggested for HEV in transplant liver biopsies for evaluating patients with elevated transaminases of unknown origin (Protzer 2014).
According to the Guidelines for Hepatitis E & Solid Organ Transplantation (https://bts.org.uk/wp-content/uploads/2017/05/BTS-HEV-Guideline-CONSULTATION_DRAFT.pdf-CONSULTATION_DRAFT.pdf; McPherson 2018) solid organ transplant recipients with liver transaminases above the upper limit of normal or symptoms suggestive of HEV infection are tested for HEV using an HEV RNA or an antigen assay. Treatment of acute HEV infection with RBV may be indicated in specific cases of acute infection with severe liver dysfunction or extrahepatic manifestations. Chronic disease courses with hepatitis E virus (HEV) infections as well as reactivation after apparent cure have been reported in organ transplant patients. In the transplant setting, HEV Guidelines from UK (McPherson 2018) define diagnosis of persistent HEV infection leading to chronic hepatitis when HEV RNA is detectable in blood or stool for more than three months after the onset of relevant symptoms, raised liver enzymes, or from the first positive HEV RNA test.
A German LT cohort comprising 287 adult patients was prospectively tested in a real-life setting using HEV polymerase chain reaction assay, irrespective of their liver enzyme levels. In 4 patients (1.4%) only, chronic HEV infection was diagnosed. These results suggest that general screening of all LT recipients with normal liver enzymes in low-endemic countries does not seem to be justified (Galante 2015).
The risk of HEV infection becoming chronic in immunocompromised (transplanted) patients is high, at around 60-65% (Kamar 2010a 2011, Legrand-Abravanel 2010). Quantification of HEV viral load is useful before initiation of antiviral therapy. In immunosuppressed patients with chronic hepatitis E, anti-HEV antibodies are often undetectable (EASL Clinical Practice Guidelines on hepatitis E virus infection; https://www.journal-of-hepatology.eu/article/S0168-8278(18)30155-7/pdf). A baseline quantitative HEV RNA assessment is undertaken on both plasma and stool at the start of treatment. A strong decrease of viral load may predict viral elimination.
A group from the Hannover Transplant Center performed HEV serology tests in 226 LT patients, 129 non-transplanted patients with liver disease, and 108 healthy controls (Pischke 2010). HEV antibodies were detectable in 4% of the transplant group, 3% of the group with liver disease and 1% of the healthy control group. Three patients from the transplant group were HEV RNA positive, two of whom developed HEV viral persistence. Anti-HEV seroconversion was observed no earlier than four months after detection of HEV RNA.
The outcome, progression and individual variables associated with HEV infection becoming chronic were analysed in a retrospective study (Kamar 2011) including data from 17 transplant centres. In the largest cohort to date involving HEV-infected transplanted patients, 74/85 patients were recruited in French centres, three in Germany, five in the Netherlands and one patient each in the UK, Belgium and the US. The vast majority of the patients had received kidney (n=48) or liver (n=27) allografts. Chronification of HEV infection was defined as persistently elevated liver enzymes and positive detection of HEV replication in serum and/or feces over a minimum of six months. 65/85 patients (65.9%) developed a chronic disease. All 59 patients who underwent HEV genotyping had genotype 3. In contrast to the non-immunosuppressed patients, transaminases were usually only moderately elevated (~100-300 IU/l). Anti-HEV IgM was detectable in only 41% and IgG was detectable in 80.8%. 14.3% of the patients developed cirrhosis of the liver by the final follow-up (29.5 months, range 9-117 months). As it is possible that seroconversion may not occur until four months or more after detection of RNA in organ transplant patients, serological testing for HEV IgG and IgM in transplanted patients is of limited use and diagnostic standard is therefore nucleic acid amplification techniques.
Initial results for seven kidney-transplanted patients, one pancreas-transplanted and one heart-transplanted patient suggest the efficacy of RBV monotherapy (Kamar 2010b, Mallet 2010, Chaillon 2011). Successful RBV monotherapy of chronic hepatitis E has also been reported after LT in recipients of solid organ transplants (Kamar 2015, Carmo 2016).
With regard to PEG-interferon α treatment of HEV infection (Abbas 2014, Kamar 2010c), there is little data available for LT patients and this treatment approach should not be used as first line therapy. A lower rate of side effects can be expected from RBV monotherapy of HEV infection in LT patients compared with PEG-interferon α therapy. Furthermore there is an increased risk of rejection on IFN α treatment. With regard to PEG-interferon α treatment of HEV infection in LT recipients, the optimum dosage and duration of treatment are not yet known. It also remains unclear what role the level of viral load before the start of treatment plays in treatment response.
So far, at least a 3-month course of RBV monotherapy seems to be an appropriate treatment duration, a longer therapy (generally >3-6 months) can be given to highly immunosuppressed patients and those with ongoing viraemia 1 month after the initiation of therapy. Prospective studies are warranted to determine the optimal dose and duration of RBV therapy (Jeong 2014). Erythropoetin therapy and/or blood transfusion may be indicated to continue antiviral therapy without RBV dose reduction. Monthly HEV RNA testing in plasma and stool is helpful until a decision is made to stop treatment and RBV is continued until stool tests are negative for HEV RNA on two occasions one month apart. A test of SVR is conducted by testing plasma and stool samples for HEV RNA at three and six months after cessation of antiviral therapy.
Advances in immunosuppressive regimens have greatly reduced the incidence of chronic ductopenic rejection and allograft failure. Chronic rejection begins within weeks to months or years after LT and accounts for a small proportion of late graft dysfunction (Suhling 2016). It affects about 4% to 8% of patients (Neuberger 1999). Donor-specific antibodies (DSAs) are increasingly being considered a cause of complications after LT. So far, neither monitoring of DSAs nor the appropriate therapeutic procedures for humoral graft damage are yet standardised.
Sub-therapeutic immunosuppression and nonadherence to immunosuppressive therapy also coincides with increased risk of rejection, substantial increases in the rates of graft loss and death. Special attention should be posed on immunosuppression-related physical side effects as a major reason for non-adherence. Multidisciplinary evaluation, in particular by transplant hepatologists and psychologists are warranted to improve adherence before and after LT. The most widely recognised manifestation of chronic rejection is obliterative arteriopathy and damage to or loss of small ducts (Demetris 1997). Chronic rejection may appear indolently and might only become apparent as liver test injury abnomalities (GGT, AP, bilirubin, transaminases). The diagnosis needs to be confirmed by histopathologic examination. Switching the baseline immunosuppression from cyclosporine A (CSA) to tacrolimus (TAC) and initiating mycophenolate mofetil (MMF) rescue therapy represents a treatment option in these patients (Daly 2002).
Despite the introduction of new immunosuppressive agents (Table 4), calcineurin inhibitors (CNI) remain the key drugs in most immunosuppressive regimens. Both CSA and TAC inhibit the calcineurin-calmodulin complex and therefore IL-2 production in T lymphocytes. TAC is available as traditional twice-daily immediate-release tacrolimus and once-daily prolonged/extended released formulations. Renal failure, mainly due to CNI nephrotoxicity, is the most common complication following orthotopic LT. The incidence of chronic renal dysfunction characterised by arteriolar hyalinosis resulting in a variety of tubulointerstitial and glomerular lesions has been reported in up to 70% of patients in the long term after LT and varies widely depending on the length of follow-up, the definition of chronic kidney disease and the intensity of immunosuppressive therapy (Beckebaum 2013b). End stage renal disease has been described in 18% of patients during a posttransplant follow-up of 13 years (Gonwa 2001).
Randomised trials have shown that induction therapy maintains immunosuppressive efficacy in steroid-free regimens. For instance, delayed CNI initiation (e.g. to days 4-5 posttransplant) can prevent deterioration of renal function posttransplant, but requires induction with an interleukin-2 antagonist receptor (IL-2RA) agent or rabbit antithymocyte globulin (rATG) to maintain early immunosuppressive efficacy.
In a study, Yoo et al. (2015) evaluated outcomes of 500 consecutive LT recipients who received a steroid-free protocol with rATG induction and a single dose of methylprednisolone given before the first dose of rATG. Mean MELD at transplantation was 22 ± 6. MMF was initiated postoperatively with delayed TAC initiation at 4.79 ± 13.3 days. TAC was replaced by SRL if serum creatinine remained above 2.0 mg/dL after 1 week. Patients were switched to TAC or SRL monotherapy at 12 weeks. Posttransplant peak creatinine was at 1 month 1.43 ± 0.95 mg/dL and improved to 1.26 ± 0.60 mg/dL (p< 0.05) at 2.5 years. Lowest GFR rate was observed at 1 month (65.6 ± 30.0) and improved by 12 months (72.7 ± 28.2, p< 0.01). One-year patient and graft survival were 92.8% and 89.6%, respectively. Rejection occurred in 22.8% of patients, 6.6% of patients had steroid-dependent rejection.
Other research groups have reported encouraging findings with steroid-free protocols including basiliximab induction therapy (Filipponi 2004, Llado 2008, Becker 2008). In a multicentre, 24-week, randomised, open-label, phase IIIb trial (DIAMOND study) renal function was investigated with once-daily, prolonged-release TAC-based immunosuppression in de novo LT recipients. Patients were administered prolonged-release TAC (initial dose 0.2 mg/kg/day); prolonged-release TAC (0.15-0.175 mg/kg/day) plus basiliximab or prolonged-release TAC (0.2 mg/kg/day delayed until Day 5) plus basiliximab. All patients had comedication with MMF plus a bolus of corticosteroids. Lower dose prolonged-release TAC (0.15–0.175 mg/kg/day) immediately posttransplant in combination with basiliximab and MMF was associated with lower TAC exposure, significantly reduced renal function impairment and biopsy-confirmed acute rejection incidence vs. prolonged-release TAC (0.2 mg/kg/day) administered immediately after LT. Delayed higher-dose prolonged-release TAC exposure significantly reduced renal impairment compared with immediate administration (Trunecka 2015).
A group from Regensburg initiated a single arm pilot study to determine the safety and efficacy of a CNI-free combination therapy (basiliximab induction/MPA and delayed [10 days posttransplant] SRL in patients with impaired renal function (GFR <50 ml/min and/or serum creatinine >1.5 mg/dL) at LT (Schnitzbauer 2015). Twenty-seven patients were included with a median labMELD of 28. Incidence of biopsy proven acute rejection was 18.5%, no steroid-resistant rejections occurred within 1 month. SRL was started on day 10 (range, day 1 to day 48), 44% of patients were switched to CNI treatment by 12 months. Renal function improved significantly (p = 0.006). The critical time period for relevant improvement of kidney function seemed to be the first month, independently from SRL administration.
In LT patients with CNI-induced nephrotoxicity, a complete replacement of CNI with conversion to MMF has shown conflicting results with respect to the occurence of rejection, anywhere from 0% to 60% (Creput 2007, Schmeding 2011, Moreno 2004). MMF inhibits inosine monophosphate dehydrogenase, a critical enzyme in the de novo pathway of purine synthesis. Results from previous studies with immunosuppressive regimens including MMF and minimal CNI treatment suggest a significant improvement in renal function in this patient group (Beckebaum 2011, Cicinnati 2007a, Beckebaum 2004a, Cantarovich 2003, Garcia 2003, Raimondo 2003).
De novo immunosuppression with MMF combined with induction therapy and delayed CNI introduction is another approach to reduce CNI-related nephrotoxicity especially in patients with higher MELD score or significant renal dysfunction. In a randomised clinical trial, a daclizumab/MMF/delayed low-dose TAC-based regimen was compared with a standard TAC/MMF regimen (Yoshida 2005). In both study arms, corticosteroids were tapered over time. Statistically significant higher median GFR was found in the delayed CNI group, although acute rejection episodes were not statistically significant different between the groups. Similar results were seen in two retrospective studies in LT patients receiving thymoglobulin induction therapy and a delayed initiation of CNI (Bajjoka 2008, Soliman 2007).
Another approach to maintain renal preservation is replacement of CNI by mTOR inhibitors such as SRL or everolimus (EVL) (Sanchez 2005, Harper 2011, Saliba 2011, Kawahara 2011, Hüsing (a) 2015).
An Italian consensus Transplant panel even recommended routine use of EVL in predefined clinical scenarios, particularly in light of posttransplant nephrotoxicity (de Simone (a) 2016).
In the multicentre randomised (1:1) controlled PROTECT study (CRAD001HDE10) de novo patients were treated with CNI (CSA or TAC) + basiliximab ± steroids for 4-8 weeks after LT and were then randomised to an EVL-based treatment arm or a CNI-based control arm (Fischer 2012). In the EVL-based treatment arm (n=101), a 70% reduction of CNI (± steroids) was carried out over a period of 2 months, followed by treatment with EVL ± steroids. In the control arm (n=102) treatment with CNI (standard dose ± steroids) was continued. Using the MDRD equation, the endpoint could be achieved with a difference in calculated GFR of at least 8 mL/min between the two treatment arms (p=0.02). The incidence of graft rejection, graft loss and death was not significantly different between the two treatment arms. A 24-month extension phase was performed in 81 patients to month 35 post-randomisation. The adjusted mean eGFR benefit from randomisation to month 35 was 9.4 mL/min/1.73 m2 with MDRD. The difference in favour of the CNI-free regimen increased gradually over time due to a small progressive decline in eGFR in the CNI group (Sterneck 2014).
Efficacy and safety of a TAC-free and a TAC-reduced regimen were compared with a TAC standard dose (TAC-C) regimen in a multinational, randomised controlled licensing trial (CRAD001H2304) in de novo LT recipients (Saliba 2011b). After a 1-month run-in phase on TAC-based immunosuppression (+/-MMF), patients were randomised to an EVL/prednisone/TAC-free group (TAC-WD) including TAC withdrawal at 4 months post-LT, an EVL/prednisone/reduced TAC group (EVL+rTAC) or a standard TAC control group (TAC-C). The primary combined endpoint included biopsy-confirmed acute rejection, allograft loss or death, and the secondary endpoint was renal function at 1 year. The TAC-WD arm was stopped prematurely due to a significantly higher incidence of biopsy-confirmed acute rejections (19.9% [TAC-WD] vs. 4.1% [EVL+rTAC] vs. 10.7% [TAC-C]).
At 1 year, significantly more patients in the TAC-C group had reached the combined primary endpoint compared to the EVL+rTAC group (9.7% vs. 6.7%; p<0.001). Kidney function was significantly better (p<0.001) in the EVL+rTAC arm than in the TAC-C arm. The increased rejection rate in the TAC-WD group at month 4 may be caused by the immunosuppressive strategy used. Unlike the CRAD001HDE10 study, no induction therapy with an anti-IL-2 inhibitor was performed and there was no weaning of CNI over 2 months. Instead, CNI were stopped abruptly.
Lin (2016) conducted a systematic review and meta-analysis of randomised controlled trials (RCT) analysing the effect of EVL on renal function in patients (EVL n=465, control n=428) with baseline GFR >30 mL/min undergoing a CNI minimisation or withdrawal protocol. Based on these results, EVL use with CNI minimisation in LT recipients was associated with improved renal function at 12 months (95% CI 2.75-17.8) but not associated with an increased risk of biopsy proven acute rejection (RR 0.68, 95% CI 0.31-1.46), graft loss (RR 1.60, 95% CI 0.51-5.00), or mortality (RR 1.34, 95% CI 0.62-2.90). However, it was associated with an increased risk of overall infections (RR 1.45, 95% CI 1.10-1.91).
|Immunosuppressant class||Immunosuppressive agent|
|Corticosteroids||Prednisone, prednisolone, methylprednisolone|
|Calcineurin inhibitors||Cyclosporin A, tacrolimus|
|Antimetabolites||Mycophenolate mofetil, azathioprine|
|mTOR Inhibitors||Sirolimus, everolimus|
|Polyclonal antibodies||Antithymocyte globulin|
|Monoclonal anti-CD3 antibodies||Muromonab-CD3 (OKT3)|
|Chimeric monoclonal antibodies||Anti-IL-2 receptor inhibitor (basiliximab)|
|Monoclonal anti-CD52 antibodies||Alemtuzumab (campath-1H)|
Besides potential nephrotoxicity, CNI therapy is associated with side effects that include cardiovascular complications, tremor, headache, electrolyte abnormalities, hyperuricaemia, hepatotoxicity, and gastrointestinal symptoms. Neurotoxicity, including tremor, paresthesia, muscle weakness, and seizures, more often occurs in TAC-treated patients; gingival hyperplasia, a rare event, and hirsutism are associated with CSA treatment.
Cardiovascular side effects due to CNI and steroids include hyperlipidaemia, arterial hypertension, and diabetes (Beckebaum 2004b).
The prevalence of new-onset diabetes mellitus after LT has been reported to occur in 9-21% of patients (John 2002, Konrad 2000). The prevalence of posttransplant diabetes is even higher if cofactors such as hepatitis C are present. In various studies, the diabetogenic potential has been reported to be higher in patients receiving TAC than in those receiving CSA. In contrast, CSA has a more pronounced effect on lipid levels. CSA can act by modulating the activity of the LDL receptor or by inhibiting the bile acid 26-hydroxylase that induces bile acid synthesis from cholesterol.
Numerous ongoing studies aim to determine the most effective immunosuppressive protocols while minimising drug-related side effects. These protocols often combine several drugs with different mechanisms of action and toxicities allowing dose adjustment. There is also a trend towards tailored immunosuppressive regimens following the aetiology of liver disease and comorbidities such as renal dysfunction and cardiovascular disease.
There is ongoing discussion of steroid avoidance due to dyslipidaemia, osteoporosis, development of cataracts, weight gain, hypertension, and a deleterious impact on glucose control. As cardiovascular disease is the second leading cause of death in the late transplant period, steroid-minimised/free regimens may be favoured in particular in patients with high risk of metabolic syndrome. A published literature review (Lerut 2009) analysed the actual status of corticosteroid minimisation protocols in LT based on a detailed analysis of 51 peer-reviewed and 6 non-peer-reviewed studies. Results from the majority of studies showed that these protocols have clear metabolic benefits and are safe with respect to graft and patient survival. These results are in line with a recent metaanalysis of 16 studies with 1347 participants demonstrating that metabolic complications such as diabetes and hypertension were statistically significantly less frequent in patients undergoing steroid avoidance or withdrawal protocols vs. steroid-containing immunosuppression (Fairfield 2018).
A healthy diet and regular exercise represent additional effective strategies to avoid or reduce serious cardiovascular complications. In patients with dyslipidaemia, hydrophilic statins such as pravastatin and fluvastatin should be preferred as they are not metabolised by cytochrome P450–3A4.
Incidence of malignancies is higher in transplant patients and depends on the length of follow-up, characteristics of the transplant population, choice of immunosuppressive therapy and the era when the LT was performed (Buell 2005, Fung 2001). A cumulative risk has been reported of 10%, 24%, 32% and 42% at 5, 10, 15 and 20 years, respectively, for development of de novo cancers after LT (Finkenstedt 2009). The highest risks in the transplant setting are non-melanoma skin cancers, mainly squamous cell carcinoma and basal cell carcinoma (Figure 4). Regular cancer surveillance programmes have been proposed by several groups; however, scientific evidence is lacking and surveillance programmes may vary from centre to centre.
Bhat et al. (2018) investigated potential risk factors for malignancies after LT analysing data from the Scientific Registry of Transplant Recipients database comprising 108,412 LT recipients. During median follow-up of 6.95 years malignancies during follow-up were 4,483 (41.3%) skin, 1,519 (14.0%) hematologic, and 4,842 (44.7%) solid organ. The 10-year probability of de novo malignancy was 11.5% (11.3-11.8%). Multivariable analysis showed that age by decade, male gender, Caucasian race, multiorgan transplant, previous malignancy and alcohol-related, autoimmune-related, and NASH-related liver disease and PSC pre-LT (compared to HCV, p<0.001) were associated with higher risk of post-LT malignancy. There was no correlation between type of immunosuppression and risk of cancer. Patients with replicative EBV infection and immunosuppressive regimens, i.e. ATG, are at a higher risk of developing PTLD. These patients may present with lymphoadenopathy and/or fever, weight loss and night sweats, and meticulous examination, serologic and imaging tests are required. Diagnosis and classification of PTLD is currently based on histologic criteria, and a multidisciplinary team is required including hematologists and transplant hepatologists for treatment of PTLD, monitoring of immunosuppressive therapy and preservation of allograft function.
In a prospective single-centre study the relationship between the development of solid organ cancers following LT and the level of CNI exposure was assessed (Carenco 2015). Data are based on 247 TAC-treated LT recipients who survived at least 1 year posttransplant. Study results showed that 43 (17.4%) patients developed de novo solid cancers. Mean TAC concentration during the first year after LT was significantly higher in patients who developed solid malignancies (10.3 ± 2.1 vs. 7.9 ± 1.9 ng/mL, p < 0.0001). Independent risk factors in multivariate analysis were tobacco consumption pretransplant (OR = 5.42; 95% CI [1.93-15.2], p = 0.0014) and mean annual TAC concentration during the first 12 months posttransplant (p < 0.0001; OR = 2.01; 95% CI [1.57-2.59], p < 0.0001). Similar results have been shown in a subgroup of patients exposed to TAC continuously for ≥3 years. Premaligant lesions such as actinic keratoses are mostly located on sun-exposed areas. Squamous cell carcinoma and basal cell carcinoma are increased by factors of ~65-200 and ~10, respectively, in organ transplant recipients as compared to the immunocompetent population (Ulrich 2008). An annual routine dermatologic follow-up exam, limitation of sun exposure and protective measures including sunscreens are highly recommended for transplant patients.Due to a higher incidence of colon cancer in patients transplanted for PSC and concomitant inflammatory bowel disease (Hanouneh 2011) an adequate colonoscopic surveillance is required at regular intervals (annual colonoscopy) even in the absence of active disease (Fevery 2011). A trend has recently been reported toward an increased incidence of advanced colon polyps and colon carcinoma in patients transplanted for diseases other than PSC after LT. However, larger studies are needed to determine whether posttransplant colon cancer surveillance should be performed more frequently than in the non-transplant setting (Rudraraju 2008).
Studies have reported a significantly higher incidence of aerodigestive cancer including lung cancer among patients who underwent LT for alcohol-related liver disease (Vallejo 2005, Jimenez 2005). These patients should undergo a more intensive surveillance protocol for the detection of upper gastrointestinal and oropharyngeal-laryngeal malignancies (Benlloch 2004). In cases of positive smoking history surveillance for lung cancer should be implemented. In a retrospective study, conversion from CNI to an mTOR inhibitor (EVL) improved the prognosis of de novo malignancies after LT for alcoholic cirrhosis (Thimonier 2014). One- and five-year survival was 77.4% and 35.2% in the EVL cohort vs. 47.2% and 19.4% in the non-EVL cohort, respectively (p=0.003).
MTor inhibitors (SRL, EVL) exert antiangiogenic activities that are linked to a decrease in production of vascular endothelial growth factor (VEGF) and to a markedly inhibited response of vascular endothelial cells to stimulation by VEGF (Guba 2002). Furthermore, the ability of mTor inhibitors to increase the expression of E-cadherin suggests a mechanism for blocking regional tumour growth and for inhibiting metastatic progression. Therefore, we give special consideration for mTOR inhibitor-based immunosuppressive regimens not only in patients transplanted for HCC but also those with de novo malignancies after LT. There is evidence from meta-analyses and studies performed mainly in the kidney transplant setting that switching from CNI to mTOR-based immunosuppression is associated with a lower incidence of non-melanoma skin cancers (Euvrard 2012, Caroti 2012, Gu 2012). A multicentre study involving CNI-treated patients with a previous history of at least one squamous cell carcinoma randomly allocated patients to an arm in which CNI was replaced by SRL, or to an arm in which the CNI-based immunosuppression was continued (Euvrard 2012). The squamous cell carcinoma-free survival was significantly longer in the SRL group than in the CNI control group. The appearance of a new squamous cell carcinoma was observed in 14 patients (22%) in the SRL group versus 22 patients (39%) in the control group (p=0.02). The authors concluded that SRL obviously has an antitumour effect regarding the reappearance or the new appearance of non-melanoma skin cancers.
The clinical outcome of patients posttransplant can be significantly affected by biliary complications (Lisotti 2015). Biliary leaks generally present as an early posttransplant complication and occur in 5% to 10% of deceased donor LT (Kapoor 2015) and in 10% to 15% of LDLT (Iida 2010). Biliary leaks are typically treated with placement of a biliary stent to bridge the leak, usually with sphincterotomy. In patients with biliary stones, endoscopic sphincterotomy and stone extraction are the treatment of choice. Biliary stone disease and in particular formation of biliary casts is common in the setting of LT and may occur without or in the setting of strictures due to impaired biliary flow. The exact aetiology of biliary cast disease is unknown but ischaemia and strictures have been described as predisposing factors (Pereira 2018). In a recently published retrospective study complication rates during the first 15 days after endoscopic sphincterotomy were assessed in patients who underwent conventional or precut endoscopic sphincterotomy (Hüsing (b) 2015). A total of 24 complications (15.2%) were reported, including 9 cases (5.7%) of pancreatitis, 6 cases (3.8%) of bleeding, and 1 case (0.6%) of perforation. Complication rates were not significantly different between the two sphincterotomy techniques.
Damage (ischaemia, infectious complications or rejection) of the biliary tree mucosa can provoke cast which consists of desquamated epithelial cells mixed with bile products within the biliary system and occurs in 3% to 18% of LT patients (Shah 2003).
Biliary strictures are one of the most common complications after LT, with a reported incidence of 5.8-34% (Graziadei 2006). Early anastomotic strictures usually have a technical origin, while strictures appearing later have a multifactorial origin. Non-anastomotic strictures without underlying hepatic artery thrombosis are commonly referred to as ischemic-type biliary lesions (ITBL).
Risk factors for ITBL include preservation-induced injury, prolonged cold and warm ischaemia times, altered bile composition, ABO blood incompatibility and immunologic injury (Verdonk 2007, Buis 2009). Our group found that specific chemokine receptor polymorphisms of the recipient are associated with the development of post-LT biliary strictures (Iacob 2012). Moreover, screening of anti-HLA antibodies might be useful for early identification of at-risk patients who could benefit from closer surveillance and tailored immunosuppressive regimen (Iacob 2012).
ERC or percutaneous transhepatic cholangiography (PTC) have typically been used as the primary approach, leaving surgical intervention for those who are non-responsive to endoscopic interventions or who have diffuse intrahepatic bile duct damage. Radiological methods such as magnetic resonance cholangiopancreatography (MRCP) have been introduced as an additional diagnostic tool for biliary complications. In cases of biliary cast and ischemic cholangiopathy, endoscopic ultrasound (EUS) was found to be diagnostically superior to ERCP and had a significant impact on clinical decision-making. EUS was less reliable when diagnosing anastomotic strictures (Hüsing 2014). EUS can complement ERCP to improve diagnosis of biliary complications after LT and impact on treatment decision.
The long-term efficacy and safety of endoscopic techniques have been evaluated in various transplant centres (Qin 2006, Zoepf 2012, Pascher 2005). Non-anastomotic strictures are commonly associated with a less favourable response to interventional endoscopic therapy in comparison to anastomosis stenosis (Figure 5). An Austrian group found anastomotic strictures in 12.6% of patients transplanted between October 1992 and December 2003 and non-anastomotic strictures in 3.7% during a mean follow-up of 53.7 months after LT (Graziadei 2006). Interventional endoscopic procedures were effective in 77% of patients with anastomosis stenosis, while treatment of non-anastomotic strictures showed long-term effectiveness in 63% of patients. A surgical approach was required in 7.4% of transplant recipients.
Results from 75 transplanted patients undergoing ERC for suspected anastomotic strictures were retrospectively analysed (Zoepf 2006). Balloon dilatation alone and combined dilatation and endoprosthesis placement was efficacious in 89% and 87% of cases respectively, but recurrence occurred in 62% and 31% of cases respectively. However, results of these strategies are inconsistent in the literature. In our centre, we use dilatation with or without stenting with endoscopic reassessment in anastomotic strictures. Repeated ERC sessions are commonly performed with increasing endoprosthesis diameter every three months and double or triple parallel stenting in selected cases. Up to 75% of patients are stent-free after 18 months of endoscopic intervention (Tung 1999).
In a prospective case series (n=13) we recently found an excellent safety and effectiveness of paclitaxel-coated balloons in the dilatation of symptomatic anastomotic stenoses (Kabar 2012). A sustained good clinical outcome of the intervention, defined as no further endoscopic intervention for at least 6 months, was achieved in 12/13 patients. Out of these 12 patients, one (n=9), two (n=1) or three (n=2) endoscopic interventions were necessary. The mean bilirubin level fell from 6.8 ± 4.1 mg/dL to 1.4 ± 0.9 mg/dL.
Medical treatment for bile duct strictures consists of ursodeoxycholic acid (UDCA) and additional antibiotic treatment in stricture-induced cholangitis. Complications related to bilioenteric anastomosis require PTC or surgical intervention.
Liver cirrhosis, heavy alcohol use, smoking, poor nutrition, hypogonadism, cholestatic liver disease, and therapy with corticosteroids are risk factors for the development of osteoporosis in pretransplant patients (Schreiber 2018). In a study assessing both vertebral and nonvertebral (rib, pelvic, and femur) fractures in pretransplant patients with PBC and PSC, 20% and 1,4% of the patients had experienced fracturing and avascular necrosis, respectively (Guichelaar 2007). Screening with bone densitometry using dual-energy x-ray absorptiometry should begin prior to LT (Wibaux 2011).
A further increase in bone turnover has been described after LT going along with bone density decrease within the first 3 to 6 months after transplant. Bone density gradually returns to pretransplant levels thereafter (Singh 2015). Posttransplant bone disease contributes significantly to patients' morbidity and mortality after transplantation and plays a role for their quality of life (Nel 2016). Factors favouring spinal bone gain from 4 to 24 months after transplantation include lower baseline and/or 4-month bone density, premenopausal status, lower cumulative glucocorticoids, no ongoing cholestasis, and higher levels of vitamin D and parathyroid hormone (Guichelaar 2006). CNI administration is a risk factor for osteoporosis after LT (Moreira Kulak 2010).
The risk of osteoporotic vertebral and nonaxial fractures was 14% and 21% at 1 and 2 years posttransplant, decreased with time, and was highest in patients with pretransplant osteopenia and cholestatic liver disease (Singh 2015).
A cumulative incidence of fractures at 1 year and at 8 years posttransplant was reported in 30% and 46% of patients transplanted for PBC and PSC (Guichelaar 2007). Nine percent experienced avascular necrosis after LT. This event was positively correlated with pretransplant and posttransplant lipid metabolism, bone mineral density and fracturing, and posttransplant glucocorticoid administration (Guichelaar 2007).
EASL Clinical Practice Guidelines focusing on Liver Transplantation (http://dx.doi.org/10.1016/j.jhep.2015.10.006) recommends bone mineral density screening yearly for patients with pre-existing osteoporosis and osteopenia, every 2-3 years in patients with normal bone mineral density and further screening intervals depending on impairment of bone mineral density and on risk factors. Regular bone mineral density screening may be hampered in some countries as it is not necessarily covered by (statutory) health insurances. There are no specific therapies for posttransplant osteoporosis besides those for non-transplanted patients. General interventions to reduce fracture risk include adequate intake of calcium and vitamin D. Secondary hyperparathyroidism and adverse lifestyle factors should be addressed and corrected. Bisphosphonates are currently the most effective agents for treatment of posttransplant osteoporosis (Moreira Kulak 2010) (www.dv-osteologie.org). A meta-analysis and systematic review of randomised controlled trials demonstrated that bisphosphonate therapy in the first 12 months post-LT is associated with reduced accelerated bone loss and improved bone mineral density at the lumbar spine (Kasturi 2010).
Disease recurrence may occur in patients transplanted for viral hepatitis, tumour disease, autoimmune or cholestatic or alcohol-related liver diseases.
HBV recurrence using combined prophylactic regimens is less than 5%. However, recurrence rates differ among various studies as most of them are small, with varying proportions of patients with active viral replication at LT and varying follow-up periods after LT. Combined use of hepatitis B immunoglobulin (HBIG) and nucleos(t)ide analogs has emerged as treatment of choice in transplanted HBV recipients (Figure 6) (Cai 2011) and its efficacy has been investigated extensively. There is a high variability (dose, duration and method of HBIG administration) in the prophylactic protocols. According to the German guidelines (Cornberg 2011) patients receive 10,000 IU HBIG IV in the anhepatic phase followed by 2000 IU during the first posttransplant week. For long-term HBIG prophylaxis, trough anti-HBs levels at or above 100 IU/L should be maintained. Subcutaneous (SC) HBIG application has advantages over intramuscular (IM) and IV administration (Yahyazadeh 2011, Beckebaum 2012, Beckebaum 2013c).
In an open, prospective phase 3 registration trial (Yahyazadeh 2011), weekly SC injections of HBIG (BT088) were given for 18 weeks with the option of a six-week extension phase. The dosage was 500 IU/week for a bodyweight (BW) ≤75 kg or 1000 IU/week for a BW >75 kg. Patients were included in the study who had so far received regular and sufficient IV HBIG reinfection prophylaxis and been transplanted for at least three months. A mean anti-HBs level of 350-400 IU/L (range 260-520 IU/L) was measured during the course of the study. No decrease in the anti-HBs level below 100 IU/L was observed in any of the patients during the study period. Results have shown that SC administration, which can be performed by patients at home, is an important factor in improving patients’ flexibility and mobility in daily life, lowering the frequency of physician consultations and avoiding AEs attributable to high peak and low trough serum anti-HBs levels compared with IV administration.
De Simone et al. (b) (2016) demonstrated that early introduction of subcutaneous HBIg administration by week 3 posttransplantation, combined with HBV virostatic prophylaxis, is safe and effective for prevention of HBV reinfection.
The European Commission granted a marketing authorisation valid throughout the European Union for SC HBIG in 2009 and it has been launched in the last few years in many European countries.
Economic issues have led to a conduct of studies investigating whether nucleos(t)ide analogue therapy instead of combined long-term nucleos(t)ide analog/HBIG is sufficient for antiviral prophylaxis (Cholongitas 2014, Teperman 2013, Naoumov 2001, Buti 2007, Lo 2005, Angus 2007, Knighton 2012, Gane 2007, Stravitz 2012, Wesdorp 2012, Fung 2011).
This has resulted in the development of a more personalised prophylaxis based on the individual risk profile of a given patient. Detection of occult intrahepatic total and HBV CCC DNA has been suggested in order to enable clinicians to select a subgroup of patients in whom withdrawal of prophylaxis may be feasible (Lenci 2010). However, this method is an elaborate approach requiring sequential liver biopsies at regular intervals and is not applicable in daily practice.
In a recently published study from Hong Kong, HBIG-free monoprophylaxis with ETV was evaluated. Only 26% of patients had undetectable HBV DNA at the time of LT. HBsAg loss occurred in 91% within 24 months posttransplant but 13% had reappearance of HBsAg within a follow-up period of 36 months and 22.5% were HBsAg positive at the time of their last follow-up visit (Fung 2011).
The efficacy of a switch after at least 12 months of HBIG/LAM to combination therapy with an oral nucleoside and nucleotide analogue was investigated (Saab 2011). Estimated HBV reinfection rate was 1.7% at 1 year after HBIG withdrawal.
A prospective, multicentre study in which 20 HBV patients received 800 IU HBIG (IM) in the anhepatic phase and for another 7 days after transplant surgery was published (Gane 2013). Patients with genotypic detection of LAM resistance and creatinine levels ≥ 1.8 mg/dL were excluded. ADV was administered as add-on therapy to existing LAM treatment. Previously untreated patients received combined ADV plus LAM treatment, which was continued after transplantation. Serum HBsAg and anti-Hbs were measured monthly in the first 3 months, then every 3 months. HBV DNA determination was only performed annually and at the end of the follow-up observation period. HBV recurrence was defined as the reappearance of HBsAg or detection of HBV DNA. The median follow-up was 57 months (range 27–83 months). At transplantation 68% of patients had demonstrable virus replication and 26% had viral replication >4 log10 IU/mL. After the end of the study, another 28 HBV patients received a liver allograft. The patients (n=18) who had HBV DNA <3 log10 IU/mL at transplantation were given no posttransplant HBIG therapy at all. The median follow-up was 22 months (range 10-58 months). Looking at both cohorts it was shown that there was a loss of HBsAg in 47/48 patients within 8 weeks posttransplantation and in one patient within 6 months after transplantation. In one patient with recurrence of HCC, there was a transient reappearance of HBsAg in the follow-up period.
In a randomised, prospective, controlled phase 2 trial, patients (n=40) received emtricitabine, TDF and HBIG for 24 weeks (Teperman 2013). Subsequently all patients who were negative for HBsAg and HBV DNA (<400 copies/mL) were randomly allocated to continue with all three drugs or to an arm with emtricitabine and TDF but without HBIG. The median period of time from LT was 3.4 years (range 1.9–5.6 years). During an observation period of 72 weeks, no HBV recurrence in terms of HBsAg or HBV DNA detection was observed in any of the patients.
Most HBV prophylactic posttransplant studies to date are limited, small and with short follow-up periods. EASL Clinical Practice Guidelines on the Management of Hepatitis B Virus Infection (2017) recommend combined hepatitis B immunoglobulin (HBIG) and a potent nucleos(t)ide analogue for prevention of recurrent HBV infection after LT. As a life-long therapy, this accounts in particular for patients with a high risk for HBV recurrence (HBV DNA positive at the time of LT, HBeAg positive, HBV underlying HCC, and HDV or HIV coinfection). EASL Clinical Practice Guidelines determine that patients with a low risk of recurrence can discontinue HBIG and proceed with indefinite nucleos(t)ide analogue monoprophylaxis.
According to updated AASLD Hepatitis B Guidance (Terrault et al. 2018) prophylaxis with or without HBIG for 5-7 days and nucleos(t)ide analogue posttransplant followed by long-term potent nucleos(t)ide analogue in low risk patients is an appropriate approach. ETV or TDF, an ester prodrug of tenofovir (TFV) or TAF, a phosphonate prodrug of TFV, with more favourable renal and bone safety than TDF are preferred antiviral drugs because of their low rate of resistance with long-term use. Combination antiviral therapy and HBIG is recommended by Terrault et al. (2018) for those with high risk of recurrent disease posttransplant (HDV- and HIV-coinfected patients and nonadherent patients).
For HBsAg negative LT recipients receiving HBsAg negative, anti-HBc–positive allografts, the reported risk of HBV transmission varies with the HBV immune status of the recipient. Those who have detectable anti-HBs titres have a significant lower rsik as compared to those without detectable anti-HBc or anti-HBs titre. EASL Clinical Practice HBV Guidelines (2017) recommend LAM as prophylactic approach; whereas AASLD Hepatitis B Guidance (Terrault et al. 2018) positively emphasises highly potent ETV, TDF or TAF for long-term prophylactic use in this scenario.
There is no rationale for continuing HBIG therapy in case of viral breakthrough with detectable HBV DNA. The choice of antiviral therapy in patients with HBV recurrence depends on the current antiviral medication, the viral load, and the resistance profile. Antiviral drug resistance can easily be established by genotypic assays that identify specific mutations known to be associated with decreased susceptibility to particular drugs.
HCV infection always recurs in the allograft in patients with detectable serum HCV RNA. The severity of HCV reinfection can be determined by liver biopsy. Transient elastography (TE) and acoustic radiation force impulse (ARFI) play a substantial complementary role for measurement of fibrosis in HCV and non-HCV transplant recipients (Cross 2011, Beckebaum 2010).
Antiviral treatment initiated after LT may be favourable after postoperative convalescence (approximately 3 months after LT). Patients with elevated liver enzymes and hepatic inflammation, and/or the risk of rapid fibrosis progression should be treated earlier. Moreover, fibrosing cholestatic hepatitis (FCH) represents an urgent treatment indication. Studies based on smaller patient cohorts demonstrated excellent results in patients with FCH treated with SOF/LDV+RBV for 12 or 24 weeks (Charlton 2015, Manns 2016). Treatment of severe recurrence after primary LT may therefore reduce the need for retransplantation.
The issue of an increased risk of rejection following HCV clearance has been debated but needs to be evaluated in properly designed studies. Preemptive DAA therapy after LT can not be recommended on a routine basis except in patients with FCH. Initiation of DAA therapy between 3-6 months after LT is encouraged.
There is a known association between HCV infection and chronic kidney disease. HCV-infected patients are 4.5 times as likely to develop some types of renal disease and 1.4 times as likely to develop renal insufficiency. Therefore, some studies recently focused on the impact of DAA on renal fuction after LT. Data from a recently published study have demonstrated that LT recipients with HCV, achieving SVR, have a significantly lower risk of a decline in renal function (Satapathy 2018).
Available data on treatment of HCV recurrence with the new DAA showed SVR rates similar to the non-transplant setting. In a prospective, multicentre, open-label pilot study, transplant recipients with compensated recurrent HCV infection of any genotype were enrolled after a primary or secondary LT (Charlton (a) 2015). Of the 40 patients enrolled and treated, 78% were male, 83% had HCV genotype 1, 40% had biopsy-proven cirrhosis, and the majority had been previously treated with interferon-based regimens. All patients received 24 weeks of SOF+RBV treatment. The primary endpoint was SVR 12 weeks after treatment which was achieved by 70%. HCV recurrence was due to virologic failure. No patients had detectable viral resistance during or after treatment. Two patients discontinued treatment due to adverse events deemed not related to study treatment. No patient died and no graft losses were observed. There were no interactions with concomitant immunosuppressive treatments.
In the SOLAR-I and SOLAR-II, phase 2 studies, patients with advanced liver disease infected with HCV genotype 1 or 4 and CPT class B or C cirrhosis or after LT were treated for 12 or 24 weeks with a combination of SOF+LDV and RBV (Charlton (b) 2015, Manns 2016). In the SOLAR-I study (Charlton (b) 2015), SVR12 was achieved in 86–89% of patients. A post hoc analysis using data from this study showed that early on-treatment HCV RNA quantification (week 2 and 4) is of limited use in patients with advanced liver disease and/or LT and does not predict SVR12 (Welzel 2016). Results of the SOLAR-II study (Manns 2016) showed among transplanted patients with genotype 1, SVR12 in n=42/45 (93%) patients without cirrhosis (12 weeks treatment); 44/44 (100%) patients without cirrhosis (24 weeks treatment); 30/30 (100%) CTP-A patients (12 weeks treatment); 27/28 (96%) of CTP-A patients (24 weeks treatment); 19/20 (95%) CTP-B patients (12 weeks treatment); 20/20 (100%) of CTP-B patients (24 weeks treatment); one/two (50%) CTP-C patients (12 weeks treatment); and four/five (80%) CTP-C patients (24 weeks treatment). No concerns were raised with respect to safety profile. Seven deaths were reported that were not considered to be related to treatment.
The ALLY-1 phase-III study (Poordad 2015), combining SOF+DCV+RBV included 53 patients with recurrent HCV infection after LT. One third of these patients already had allograft cirrhosis. Overall, ninety-four per cent of LT recipients (95% and 91% with genotype 1 and 3 infection, respectively) with recurrent HCV achieved an SVR12. Three patients who were treated peritransplant and had minimal dose interruption achieved SVR12. As expected, using this treatment regimen, no drug drug interactions occured with immunosuppressive agents.
In the phase II CORAL-I study (Kwo 2014), treatment consisted of the HCV protease inhibitor paritaprevir (ABT-450), the NS5A inhibitor ombitasvir (ABT-267) with a ritonavir booster in a once-daily coformulation, taken with the twice-daily non-nucleoside HCV polymerase inhibitor dasabuvir (ABT-333). This study included 34 participants. About 80% were men and the mean age was 60 years. Eighty-five per cent had HCV genotype 1a, the remaining 1b. Liver biopsies revealed that 18% had Metavir stage F0, 38% had stage F1, and 44% had stage F2. The median time between transplant and treatment was 40 months. None had received treatment since transplantation, but some had pretransplant treatment with PEG-interferon+RBV. CNI dose adjustment was performed since a previously performed drug-drug interaction study had demonstrated that the 3D combination regimen with immunosuppressants resulted in increased levels of TAC (by 7-fold) and CSA (by 3-fold). At 12 and 24 weeks post-treatment, 97% of patients had SVR or continued undetectable HCV viral load. One patient who did not achieve SVR presented with early viral relapse 3 days after treatment. Two patients experienced serious adverse events and one patient discontinued early due to adverse events but achieved SVR12. The most frequently reported side effects included fatigue, weakness, insomnia, headache, cough, anaemia, diarrhoea and nausea. Five patients needed erythropoietin; all patients with reduced RBV doses achieved SVR. Two participants had a grade 3/4 bilirubin elevation; there were no episodes of acute or chronic rejection, no graft loss and no deaths. Due to drug drug interactions combination of paritraprevir/r plus ombitasvir plus dasabuvir is not the primary choice in transplant patients treated with CNI/mTOR inhibitors.
Data from the TARGET-cohort (Sulkowski 2016) analysing HCV treatment with SOF+SMV with or without RBV in LT recipients with HCV genotype 1 showed an SVR12 in 84% of patients. Model-adjusted estimates demonstrated that patients with cirrhosis, prior decompensation, and previous protease inhibitor treatments were less likely to achieve an SVR. Combination with RBV had no detectable effects on SVR.
The safety and efficacy of SOF has been investigated but not been established so far in patients with severe renal impairment. The main SOF metabolite (GS-331007) is eliminated primarily via renal clearance. Pharmacokinetic studies in HCV negative patients with renal dysfunction show a significant increase in serum levels of SOF and the metabolite GS-3310007 as compared to patients with normal renal function (Gane 2014). Based on available data SOF may be used in the setting of mild-moderate renal impairment, but should not be used for severe renal impairment (GFR less than 30 ml/min) or in patients on hemodialysis.
Grazoprevir+elbasvir are renally excreted and there is no need for dose adjustments in chronic kidney disease. The largest study in the renally impaired patient population was the C-SURFER study (Roth 2015). In this placebo-controlled trial, patients (n=224) were randomised to immediate treatment with grazoprevir/elbasvir or to deferred treatment including placebo for 12 weeks, then grazoprevir/elbasvir at follow-up week 4. The cohort included patients with GFR<30 mL/min and those on hemodialysis. SVR was 99% (95% CI 95•3–100•0; 115/116), with one relapse 12 weeks after end of treatment. This regimen had a low rate of adverse events and seems to be a promising approach in genotype 1 HCV patients with stage 4–5 chronic kidney disease.
In the MAGELLAN-2 study, 80 liver and 20 kidney transplant recipients on a stable immunosuppressive regimen were included (Agarwal 2017; Reau 2018). Prednisone/prednisolone was permitted at ≤10 mg/day and CSA at ≤100 mg/day at the time of screening. SOF/VEL for 12 weeks was highly effective in LT recipients with recurrent, chronic HCV infection. Three patients did not achieve SVR, one with one early discontinuation and 2 relapses. All patients (n=4) with baseline Y93H resistance-associated substitutions (RASs) (3 GT 3 and 1 GT 1b) achieved SVR12. No changes in immunosuppression were needed for rejection or suspected drug-drug interactions.
According to EASL Recommendations on Treatment of Hepatitis C (2018) patients with posttransplant HCV recurrence with non-cirrhotic changes of the allograft, with Child-Pugh A, B, C cirrhosis can be treated with SOF and LDV (genotypes 1, 4, 5 or 6), or with SOF and VEL (all genotypes). Treatment regimen of patients with posttransplant recurrence of HCV genotype 2 or 3, without cirrhosis or with Child-Pugh A comprises SOF and VEL for 12 weeks. Pre-treatment adjustment of immunosuppressive dose is not necessary. Daily weight-based RBV (1,000 or 1,200 mg in patients <75 kg or ≥75 kg, respectively or initial dose of 600 mg daily, with subsequent dose increase, if tolerated) is recommended in Child-Pugh B and C cirrhosis.
As in the non-transplant setting, PI should not be used in transplanted patients with Child B and C cirrhosis. Patients with decompensated cirrhosis and contraindications or intolerance to RBV, should be treated with SOF and LDV (genotypes 1, 4, 5 or 6) or the fixed-dose combination of SOF and VEL (all genotypes) for 24 weeks.
Because of frequent drug-drug interactions and the need for immunosuppressant drug dose adjustments, treatment regimens including a PI are suboptimal for HCV treatment post-LT. However, in LT recipients with impaired kidney function, the combination of glecaprevir and pibrentasvir for 12 weeks is an alternative to SOF-based regimens. Non-cirrhotic patients and Child-Pugh A cirrhotic patients with posttransplant recurrence and impaired renal function (eGFR <30 ml/min/1.73 m2) can be treated (irrespective of genotype) with glecaprevir and pibrentasvir for 12 weeks. This treatment regimen requires monitoring of immunosuppressant drug levels and potential dose adjustments.
Data on the frequency of recurrent cholestatic and AIH-related liver disease vary in the literature depending on the follow-up period and criteria chosen for definition of disease recurrence which may be more aggressive than the original disease in some transplant patients (Carbone 2014). The posttransplant prognosis for PBC patients is excellent, with an approximately 80% 5-year survival reported by most large centres (Carbone 2011, Silveira 2010). It has been reported that HLA-A, -B, and -DR mismatches between the donor and the recipient decrease the risk of disease recurrence in PBC patients (Morioka 2007a, Hashimoto 2001). A published study with long term follow-up data reported recurrent PBC in one-third of patients at 11-13 years posttransplant (Charatcharoenwitthaya 2007). This study and various other studies reporting recurrent PBC are depicted in Table 5.
|Reference||Patients, n||Follow-up after liver transplantation||Recurrence rate|
|AIH||Duclos-Vallée 2003||17||>120 months||41%|
|AIH||Prados 1998||27||mean 44 months||33%|
|AIH||Molmenti 2002||55||median 29 months||20%|
|AIH||Campsen 2008||66||median 81 months||36%|
|AIH||Vogel 2004||28||mean 100 months||32%|
|PBC||Charatcharoenwitthaya 2007||154||mean 130 months||34%|
|PBC||Jakob 2006||100||up to 17 years||16%|
|PBC||Liermann-Garcia 2001||400||mean 56 months||17%|
|PBC||Montano-Loza 2010||108||mean 88 months||26%|
|PBC||Hytiroglou 2008||100||mean 44 months||16%|
|PSC||Cholongitas 2008||69||median 110 months||13%|
|PSC||Alabraba 2009||230||median 55 months||24%|
|PSC||Vera 2002||152||median 36 months||37%|
|PSC||Graziadei 1999||150||mean 54 months||20%|
|PSC||Goss 1997||127||mean 36 months||9%|
Diagnosis of PBC in the transplanted liver is usually more challenging than diagnosis in the native liver. Anti-mitochondrial antibodies (AMA) often persist, and elevated cholestatic enzymes may be due to other causes of bile duct damage such as ischemic cholangiopathy or chronic ductopenic rejection. Recurrent PBC is a histological diagnosis, typically appearing as granulomatous cholangitis or duct lesions. The frequency of recurrence will be considerably underestimated if a liver biopsy is carried out only when clinical features are apparent.
In a Japanese multicentre study, recipient aged 61 years or older, HLA mismatches of four or more (maximum of six), graft:recipient weight ratio less than 0.8, and husband donor were reported as negative predictors of patient survival in PBC patients after LDLT (Egawa 2016). Some investigators have found that CSA-based immunosuppressive therapy is associated with lower PBC recurrence rates as compared to TAC-based immunosuppression (Wong 1993, Montano-Loza 2010). However, long-term survival has been shown to be not significantly different between CSA- and TAC-treated patients (Silveira 2010).
In the Mayo Clinic transplant cohort, 50% of recurrent PBC patients receiving UDCA showed normalisation of serum alkaline phosphatase and alanine aminotransferase levels over a 36-month period compared to 22% of untreated patients (Charatcharoenwitthaya 2007). Although no significant differences in the rate of histological progression was detected between the treated and untreated subgroups, the proportion of individuals with histological progression was significantly lower in those that showed improvement of biochemical parameters regardless of treatment.
A recently published multicentre study showed that preventive treatment with UDCA reduces the risk of PBC recurrence after LT (Bosch 2015). The 5, 10, and 15-year rates of recurrence were 11%, 21%, and 40%, respectively, under UDCA treatment, and 32%, 53%, and 70%, respectively, without preventive UDCA. However, neither preventive UDCA nor recurrence had a significant impact on survival. EASL Clinical Practise Guidelines on Liver Transplantation (2015) do not recommend prophylactic use of UDCA in patients transplanted for PBC and PSC (http://dx.doi.org/10.1016/j.jhep.2015.10.006). Recently published German Guidelines for autoimmune related liver diseases recommend use of UDCA in patients with recurrent PBC (Strassburg 2017).
Obeticholic acid (OCA) is a promising new therapy that has been shown to substantially improve the long-term outcomes of PBC patients with inadequate response or intolerance to UDCA in the non-transplant setting. However, data are awaited to examine the effects of OCA on clinical outcome in patients with recurrent PBC and the need for an alternative treatment option other than UDCA. Since bile salts are responsible for the secondary toxic consequences, bile salt and nuclear hormone directed therapies may improve secondary toxic injury and are under current investigation. However, so far, these drugs are not available yet.
The reported recurrence rates for PSC after LT range between 9% and 37% (Cholongitas 2008, Alabraba 2009, Vera 2002, Graziadei 1999, Goss 1997). Biliary complications and diagnosis of recurrent PSC can be easily managed in patients with duct-to-duct biliary reconstruction. While Roux-en-Y hepaticojejunostomy was previously the common anastomotic technique for LT in patients with PSC, duct-to-duct reconstruction is currently recommended if there is no evidence of pathological changes of the common bile duct.
Recently published German Guidelines for Autoimmune Related Liver Diseases state that UDCA can be used for patients transplanted for PSC as randomised controlled studies on the efficacy of UDCA in patients transplanted for PSC are not available (Strassburg et al. 2017). UDCA does not seem to have an influence on PSC recurrence rates. Preclinical studies in the non-transplant setting suggest that FXR- and PPAR-agonists, inhibitors of the apical sodium-dependent bile salt transporter (ASBT-inhibitors) and the C23 UDCA derivative nor-UDCA are promising agents for the treatment of PSC. However, data from studies targeting new therapeutic approaches in LT patients with recurrent PSC are not available.Various risk factors for PSC recurrence have been identified including the presence of cholangiocarcinoma prior to LT; presence of certain human leukocyte antigen (HLA) such as HLA-DRB1*08, HLA DR52 in the recipient or donor; male recipient, a recipient-donor gender mismatch; recipient age, an intact colon in the recipient prior to LT, the presence of ulcerative colitis and early cholestasis after LT; use of extended donor criteria grafts; acute cellular rejection, steroid-resistant acute cellular rejection or use of OKT3; maintenance of steroid therapy for ulcerative colitis for more than 3 months; and CMV infection in the recipient (Faisal 2015, Montano-Loza 2016 ). An increased risk of recurrence has been reported in recipients of grafts from first-degree living related donors in two small single centre series from Japan (Tamura 2007, Haga 2007).
Recurrent PSC is diagnosed by histology and/or imaging of the biliary tree and exclusion of other causes of non-anastomotic biliary strictures. Histopathological findings in PSC include fibrous cholangitis, fibro-obliterative lesions, ductopenia, and biliary fibrosis. A British LT group found significantly better recurrence-free survival rates in patients who underwent colectomy before or during LT and in those with with non-extended donor criteria allografts (Alabraba 2009).
Interestingly, despite immunosuppression, a significantly higher corticosteroid requirement was reported in the transplant compared to the non-transplant setting, with 20% of PSC patients with concomitant PSC becoming corticosteroid dependent after LT (Ho 2005). A recent study reported that maintenance steroids (>3 months) for ulcerative colitis post-LT were a risk factor for recurrent PSC (Cholongitas 2008). A Scandinavian group studied the risk of colorectal neoplasia among 439 PSC patients, 80% of whom had chronic inflammatory bowel disease prior to LT and 3% of whom had developed de novo chronic inflammatory bowel disease (Jørgensen 2012). The median history of chronic inflammatory bowel disease was 15 years (range 0–50 years) and the follow-up period posttransplantation was 5 years (range 0–20 years). A fourth of the PSC patients who additionally had bowel involvement developed colorectal neoplasias. This frequency was twice as high postoperatively than before LT. Patients receiving TAC and MMF had a significantly higher risk of chronic inflammatory bowel disease-associated active inflammation than patients taking CSA and azathioprine (Jørgensen 2013). Morover, in a recently published Swedish study (Lindström 2018) TAC was reported as an independent risk factor for PSC recurrence. However, due to conflicting results in literature, impact of immunosuppression on PSC recurrence needs further investigation.AIH recurrence has been reported in about one-third of patients within a posttransplant follow-up period of ≥5 years (Mendes 2011, Tripathi 2009, Campsen 2008, Vogel 2004). Transplantation centres commonly maintain AIH patients on prednisone after LT to reduce rejection and recurrence rates. However, there is lacking evidence for this approach and impact of type and dosing of immunosuppressive drugs on outcome needs further investigation. Survival rates post-LT are approximately 90% and 70% at 1 and 5 years (Montano-Loza 2016). A long-term follow-up study (>10 years) by a French group found AIH recurrence in 41% of the patients. The authors recommended regular liver biopsies, because histological signs precede abnormal biochemical liver values in about one-fourth of patients (Duclos-Vallee 2003). The diagnosis of recurrent AIH may include histological features, the presence of autoantibodies, and increased gamma globulins. Histological signs of recurrence include interface hepatitis, lymphoplasmacytic infiltration, and/or lobular involvement. The majority of published studies did not confirm a posttransplant prognostic role of antibodies in patients undergoing LT for AIH. Conflicting data exist regarding the presence of specific HLA antigens that predispose patients to AIH recurrence after LT (Gonzalez-Koch 2001, Molmenti 2002).
Recurrent AIH must be distinguished from de novo AIH, which is a clinical entity resembling AIH and develops in LT recipients transplanted for other liver disorders. It was originally described in children after LT. The incidence of de novo AIH is variable because multiple descriptions have been used in case series. The Banff working group on liver allograft pathology has recently suggested that the nomenclature ‘de novo AIH’ should be replaced by the terminology ‘plasma-cell rich rejection’ (Montano Loza 2016, Demetris 2016).
The results of early studies of LT for HCC were disappointing. More than 60% of patients developed tumour recurrence within the first two years posttransplant (Ringe 1989). Currently, there are recurrence rates of 10-15% in patients fulfilling the Milan criteria (Zavaglia 2005). In analyses of predictors of survival histological grade of differentiation, macroscopic vascular invasion and satellitosis were identified as independent predictors of survival and tumour recurrence (Zavaglia 2005, Hoyos 2015). Others identified MELD score >22, AFP >400 ng/mL and age >60 years as negative predictors for survival in HCC (Sotiropoulos 2008b, Jelic 2010). Several retrospective cohort studies are published in literature which demonstrated statistically significant differences in survival and recurrence between different RECIST criteria after LT (Morris 2016). However, there are no RCTs available measuring response to locoregional therapies using RECIST as a predictor of long-term survival after LT.
AFP independently predicts tumour recurrence and correlates with vascular invasion and differentiation (Duvoux 2016). Recently a French group of researchers developed a new selection model called the AFP score. This score allows patients with HCC not meeting Milan criteria but scored 2 or lower, with AFP levels less than 100 ng/mL and a low 5-year risk of recurrence to be transplanted with excellent results (Duvoux 2016). In a recent study, Notarpaolo (2016) tested this AFP score in a population of non-French patients transplanted for viral hepatitis underlying HCC. The authors concluded that in this specific population, the AFP model better selects patients with HCC as compared to Milan criteria and that the AFP score can also be implemented in countries with an important burden of HCC occurring on post-hepatitic cirrhosis.
For patients having an indication for LT despite exceeding the Milan criteria, the use of marginal grafts or performance of LDLT has been considered as a reasonable option.
Expansion beyond the Milan criteria to University of California San Francisco (UCSF) criteria (single tumour <6.5 cm; two to three tumours, none >4.5 cm or total diameter <8 cm, no vascular invasion) or even more liberal criteria (no portal invasion, no extrahepatic disease) have been discussed widely (Sotiropoulos 2007, Silva 2011, Jelic 2010). Centers such as the San Francisco Transplant Group as well as the UCLA Transplant Group have demonstrated 5-year survival rates of 50-80% after LT for tumours beyond the Milan criteria but within UCSF criteria (Duffy 2007, Yao 2007).
The ‘up to seven’ criteria (7 being the sum of the size and number of tumours for any given HCC) was suggested as an approach to include additional HCC patients as transplant candidates. However, acceptance of a more liberal organ allocation policy would result in a further increase of HCC patients on the waiting list and in denying the use of these organs to other non-HCC patients.
The existence of several scoring systems in this era of LT shows on the one hand the widely held conviction of the transplant community that the well-established Milan criteria are too restrictive, not allowing many HCC patients the LT opportunity; on the other hand, this situation reflects some limitations of the existing pretransplant radiological evaluation (Sotiropoulos 2009). Multiple reports in the radiology literature address nodule detection in cirrhotic livers by means of CT, MRI, or ultrasonography. Many of them conclude that contrast-enhanced MRI is the most sensitive technique for detecting liver nodules (Teefey 2003, Tokunaga 2012). MRI has been shown to depict only 39 of 118 HCC in cirrhosis, for an overall sensitivity of 33% (Krinsky 2002). Detection of small tumours was inadequate, with only 11 of 21 lesions (52%) between 1 and 2 cm and 3 of 72 lesions (4%) <1 cm correctly classified. The sensitivity in the series from Essen was similarly poor, 0% for tumours <1 cm and 21% for tumours between 1 and 2 cm (Sotiropoulos 2005). Similar findings have been reported (Bhartia 2003) with the conclusion that the identification rate of tumours <1 cm is still limited. The presence of microvascular invasion and, in some cases, macrovascular invasion of segmental branches can usually be determined by pathologic inspection of the explanted liver. This, together with inaccurate tumour detection, leads to upgrading of the tumour stage or the classification according to the different sorts of criteria in the posttransplant period, compared to assumed stages by radiological evaluation. More important, however, is the fact that some patients might not be given the opportunity to undergo LT on the basis of inaccurate radiological and clinical preoperative staging.
Mazzaferro et al. (2018) found that patients with HCC achieve a 70% chance of HCC-specific survival 5 years after LT, if AFP level are <200 ng/mL and the sum of number and tumour size (in centimeters) do not exceed 7. The authors created a model comprising level of AFP, tumour size, and tumour number, to determine the risk of death from HCC-related factors after LT and to define selection criteria for LT in HCC patients. For this purpose they provided an online calculator to predict 5-year survival and risk of HCC-related death.
Expansion of criteria in the LDLT setting is even more challenging due to the donor risk and the risk of selection of tumours with unfavourable biology following the concept of fast-tracking (Hiatt 2005). Novel molecular biology techniques, such as genotyping for HCC, may become relevant for determining recurrence-free survival and improving patient selection, but these biomarkers can not yet be used for clinical decision making.
A potential survival benefit was reported in studies and a meta-analysis of controlled clinical trials with SRL-based immunosuppression in patients transplanted for HCC (Kneteman 2004, Zimmerman 2008, Toso 2007, Liang 2011). These results are in line with a retrospective analysis based on the Scientific Registry of US Transplant Recipients, which included 2491 HCC LT recipients and 12,167 recipients with non-HCC diagnoses. Moreover, the SILVER Study, a large prospective RCT, comparing SRL-containing versus SRL-free immunosuppression showed a benefit in recurrence-free survival and overall survival in the SRL group in the first 3 to 5 years, in particular in low risk patients, but did not improve long-term recurrence-free survival beyond 5 years (Geissler 2016). Although initial post-LT survival rates were poor in patients with unresectable hilar CCA outcomes, after introduction of the Mayo Clinic protocol, outcomes have been more promising. Neoadjuvant chemoradiation and subsequent LT has shown promising results for patients with localised, unresectable hilar cholangiocellular carcinoma (CCC) (Welling 2014, Masuoka 2011). In a published US study, the outcome of 38 patients who underwent LT was compared to that of 19 patients who underwent combined radical bile duct resection with partial hepatectomy (Hong 2011). The tumour was located in the intrahepatic bile duct in 37 patients and in the hilar bile duct in 20 patients. Results demonstrated that LT combined with neoadjuvant and adjuvant therapies is superior to partial hepatectomy with adjuvant therapy. Challenges of LT attributable to neoadjuvant therapy include tissue injury from radiation therapy and vascular complications includingHAT. Predictors of response to the neoadjuvant protocol prior to LT need to be determined (Heimbach 2008). Increasing age, high pretransplant tumour marker, residual tumour size in the explant >2 cm, tumour grade, previous cholecystectomy and perineural invasion were identified as predictors of recurrence following LT (Knight 2007).
Metastatic lesions originating from neuroendocrine tumours (NET) may be hormone-producing (peptide hormones or amines) or may present as nonfunctional tumours (Frilling 2006). They are characterised by slow growth and frequent metastasis to the liver, and their spread may be limited to the liver for protracted periods of time. Most studies in patients transplanted for NET are limited and usually restricted to small numbers of patients. An analysis based on the UNOS database including patients transplanted for NET between October 1988 and January 2008 showed that long-term survival of NET patients was similar to that of patients with HCC. Excellent results can be obtained in highly selected patients and a waiting time for LT longer than 2 months (Gedaly 2011). Long-term results from prospective studies are needed to further define selection criteria for patients with NET for LT, to identify predictors for disease recurrence, and to determine the influence of the primary tumour site on patient posttransplant survival.
Alcoholic liver disease has become a leading indication of LT in Europe and the US. Patients suffering from either severe acute alcoholic hepatitis or acute-on chronic liver failure (ACLF) and not responding to medical therapy have high 3-month mortality rates of approximately 60%-70%.
A period of abstinence from drinking alcohol is widely required prior to listing. The UNOS and Eurotransplant has still adopted the 6-month rule, although “exceptional” cases may be referred to regional review boards for consideration. A study group from France (Mathurin 2011) favoured early transplantation in severe alcoholic hepatitis as a reasonable rescue option for patients who failed to respond to conservative therapy. A lively international debate about the selection criteria in patients with alcohol-induced liver disease was sparked in 2012. It is to be hoped that standardised and validated methods for encouraging compliance prior to LT will be available in the future and more reliable prognostic factors regarding alcohol relapse can be identified. Recommendations on the management of alcohol-associated liver diseases before and after LT for clinical practice are available on the EASL website (http://www.easl.eu/clinical-practice-guideline).
Patient and graft survival is excellent in those maintaining alcohol abstinence after LT. Severe chronic alcohol consumption after LT significantly decreases the medium- and long-term survival (Pfitzmann 2007). Recent studies have shown that urine ethyl glucuronide (EtG) or hair-EtG determinations are reliable markers for detection of alcohol relapse after LT (Staufer 2011, Hilke 2014). Reported rates of returning to drinking after LT for alcoholic liver disease vary in the literature. Studies revealed a mean incidence of relapse in one-third of patients ranging from 10% to 50% in up to 5 years of follow-up (EASL Clinical Practical Guidelines 2012: Management of Alcoholic Liver Disease). 10% to 15% of patients with recurrent alcohol disease resume heavy drinking with damage of the new liver (Marroni 2015).
According to results from the European Liver Transplant Registry (ELTR), mortality and graft failure were more often related to de novo tumours, cardiovascular and social factors in alcoholic LT patients as compared to patients transplanted for other etiologies (Burra 2010). Many studies have assessed possible risk factors for alcoholic relapse after LT. The following factors have been identified as risks for recurrent alcohol abuse: a shorter length of abstinence before LT, more than one pretransplant alcohol withdrawal, alcohol over-use in close relatives, younger age, and alcohol dependence (Perney 2005). Accordingly, the results from the Pittsburgh Transplant Center revealed that the prognosis regarding continued abstinence posttransplant is much more favourable for individuals with a diagnosis of abuse than for those who meet criteria for alcohol dependence (DiMartini 2008).
An Australian study identified the presence of psychiatric comorbidities, or a score higher than 3 on the High-Risk Alcoholism Relapse (HRAR) scale as factors predictive of relapse into harmful drinking (Haber 2007). A recently published study reported that poorer social support, family alcohol history, and pretransplant abstinence of ≤6 months showed significant associations with relapse (Dew 2008). However, the role of the length of pretransplantation abstinence, the so-called “6-month rule”, as predictor of post-LT abstinence is still questionable (EASL Clinical Practical Guidelines 2012: Management of Alcoholic Liver Disease). An advantage of the 6-month period of abstinence before listing is avoidance of unnecessary LT in patients who will spontaneously improve.
The American Consortium of Early Liver Transplantation (LT) for Alcoholic Hepatitis analysed outcome of early LT for patients without mandatatory period of sobriety with severe alcoholic hepatitis. Data derived from 12 centres from 8 UNOS regions (Lee 2018). The authors reported a cumulative incidence of any alcohol use (slips or sustained alcohol use) of 25% at 1 year (95% CI, 18%-34%) and of 34% at 3 years (95% CI, 25%-44%) after LT. The cumulative incidence of sustained alcohol use was 10% at 1 year (95% CI, 6%-18%) and 17% at 3 years (95% CI, 10%-27%) after LT. Patients overall survival after 1 year (94%) and 3 years (84%) was not significantly worse compared to patients undergoing LT for other indications but sustained drinking after LT was associated with increased mortality (hazard ratio, 4.59; P=.01).
The increasing incidence of obesity and the metabolic syndrome throughout developed countries results in an increasing proportion of patients transplanted for NAFLD (Darwid Murash 2015). Younossi et al. (2016) constructed a steady-state prevalence model to quantify the economic and clinical burden of NAFLD in the United States and Europe. Data were validated using a computerised disease model. In the United States, over 64 million people are projected to have NAFLD, with an annual direct medical burden of approximately $103 billion ($1,613 per patient). In Germany, France, Italy, and United Kingdom, the authors estimated ~52 million people with NAFLD with an annual cost of approximately €35 billion (from €354 to €1,163 per patient). Life style interventions are of utmost importance and overweight patients who achieve significant reductions in body weight through physical activity and low caloric diet can decrease liver fat, visceral and subcutaneous adipose tissue (Copaci 2015). There are continuous efforts on finding novel agents to help prevent and to mediate the progression of NAFLD. Treatment of NAFLD will likely involve a holistic, multidisciplinary and personalised approach (Malhotra 2015).
Weight gain after LT is significantly greater in patients with older age (>50 years) and in those transplanted for chronic compared with fulminant liver failure. Thus, at least for steroid-free regimens, weight gain seems to be unrelated to any specific immunosuppressive drug. The greatest weight gain has been observed after the first 6 months posttransplant. Physical activity in LT recipients should be proposed as part of their therapeutic regimens. It also appears to improve health-related quality of life after LT, thus regular exercise programmes and a healthy diet may be incorporated to avoid cardiovascular morbidity and mortality and NAFLD recurrence.
The importance of the gut microbiome in mediating hepatocyte inflammation and intestinal permeability may also offer future treatment options. Patients transplanted for NAFLD present similar outcomes compared with patients transplanted for other indications (Burra 2014). Reported NAFLD recurrence rates after LT vary in the literature, ranging between 20 and 40%. The components of metabolic syndrome are often exacerbated following LT by factors such as immunosuppression requiring an aggressive management of cardiovascular complications after transplantation.
Adequate preconception counseling is crucial to provide optimal conditions for pregnancy and to modify immunosuppressive therapy if necessary to minimise risks for both the mother and the fetus. Female LT patients of reproductive age should preferentially use contraception during the first 12 months after transplantation. Fetal loss, prematurity, and low birth weight have been reported in women who have undergone transplantation, and maternal risks include hypertension, preeclampsia, gestational diabetes, and graft dysfunction. The rate of caesarean section is considerably higher in post-LT patients. Steroids, CNIs have not been reported to be teratogenic and should be maintained during pregnancy; whereas mycophenolate mofetil has shown to cause malformations in animal models and should be avoided. mTOR inhibitors may affect spermatogenesis in male recipients. More studies should be designed to investigate the role of immunosuppression on sexual dysfunction. In a retrospective recently published study, Zaffar et al. (2018) considered 41 pregnancies in 28 transplanted women. Mean transplant-to-pregnancy interval was 8.5±5.1 years. Immunosuppressive therapy consisted of TAC ± azathioprine (n=26), CSA (n=4) and prednisone with other immunosuppressive drugs (n=11). During pregnancy the following adverse events have been reported: hypertension (n=10), impairment of renal function (n=6), gestational diabetes (n=4), impairment of allograft function (n=2), and blood transfusion requiring anaemia (n=1). Two miscarriages, three stillbirths and one neonatal death occured. Moreover, five small-for-gestational-age infants, one minor congenital anomaly and premature delivery in fourteen infants (38.9%) have been reported.
Although there is an increased risk for pregnancy-related complications as compared to the general population an appropriate multidisciplinary care, stable graft function at pregnancy onset and adherence to immunosuppressive regimens are a good prerequisite for a successful pregnancy and delivery after LT.
LT is regarded as an effective treatment strategy for patients with Wilson’s Disease, which presents as deterioration of cirrhosis not responsive to treatment, as acute-on-chronic disease or fulminant hepatic failure (Moini 2010). LT reverses the abnormalities of copper metabolism by converting the copper kinetics from a homozygous to a heterozygous phenotype, thus providing an adequate increase of ceruloplasmin levels and a decrease of urinary copper excretion posttransplant. The King’s College Hospital reported excellent long-term results after LT in patients who have undergone LT for Wilson’s Disease since 1994 with 5-year patient and graft survival rates of 87.5% (Sutcliffe 2003). There are several reports in the literature indicating a reversal of neurological symptoms after LT (Martin 2008). However, the course of neurological symptoms remains unpredictable and it is still a matter of debate whether LT should be considered in patients with severe neurological impairment (Pabón 2008).
AAT deficiency is a common genetic reason for paediatric LT, but a rare indication in adults. The Z allele is most commonly responsible for severe deficiency and disease. LT corrects the liver disease and provides complete replacement of serum AAT activity. 567 AAT recipients who underwent LT between 1995 and 2004 were retrospectively investigated (Kemmer 2008). Results based on UNOS data revealed 1-, 3-, and 5-year patient survival rates of 89%, 85%, and 83%, respectively.
In haemochromatosis, iron depletion therapy prior to LT may be associated with a better outcome after LT and is strongly recommended (Weiss 2007). It has been reported that the survival of patients who undergo LT for hereditary haemochromatosis is markedly lower in comparison to other indications (Dar 2009, Brandhagen 2001). Reduced posttransplant survival in patients with haemochromatosis has been attributed to cardiac problems and increased infectious complications. Findings derived from the UNOS database revealed 1- and 5-year survival rates of 75% and 64% in patients with iron overload, as compared to 83% and 70% in those without iron overload (Brandhagen 2001). More recent results from patients with haemochromatosis (n=217) transplanted between 1997 and 2006 revealed excellent 1- (86.1%), 3- (80.8%), and 5-year (77.3%) patient survival rates, which were not different from those transplanted for other liver diseases (Yu 2007).
LT halts production of mutated transthyretin (TTR) and therefore represents an accepted treatment for hereditary transthyretin (ATTR) amyloidosis, a systemic amyloidosis mainly affecting the peripheral nervous system and heart (Rocha 2016). Okumura et al. (2016) recently assessed 29 non-transplant and 36 transplant FAP V30M patients using an FAP clinical scoring system. He found that LT had beneficial effects on FAP clinical manifestations in these patients. However, the effects of transplantation on the clinical manifestations of FAP have not been systematically investigated and future studies are urgently warranted.
About half of acute hepatic failure (AHF) patients undergo LT. ALF accounts for 5-12% of LT activity worldwide.
Of patients listed for transplantation, approximately one third will recover spontaneously without the need for grafting; thus, in as many as 20% of ALF patients LT is required (Lee 2012). Transplantation should be considered in those patients fulfilling Clichy or Kings College criteria (EASL Clinical Practical Guidelines on the Management of Acute (Fulminant) Liver Failure (2017); http://www.easl.eu/medias/cpg/ALF/English-report.pdf). Drug-induced liver injury due to acetaminophen overdose is the most common cause of LT for acute liver failure in developed countries (Craig 2010, Au 2011). Other etiologies comprise idiosyncratic drugs (such as isoniazid/rifampicin, cumarins, acetaminophen, ectasy, tricyclic antidepressants), Budd-Chiari syndrome, Wilson’s Disease, hepatitis A, B and E infection or autoimmune disease.
Patients with acute fulminant liver disease should be transferred to an ICU at a medical centre experienced in managing AHF, with LT capabilities. Bioartificial hepatic devices may serve as bridging therapy to native liver recovery or to LT.
Early postoperative complications in patients transplanted for AHF include sepsis, multisystem organ failure, and primary graft failure. Serum creatinine concentrations above 200 µmol/L pretransplant, non-white race of the recipient, donor body mass index >35 kg/m2 and recipient age >50 years have been suggested as risk factors for posttransplant mortality (Wigg 2005). Others reported that extended donor criteria rates and severe cerebral edema were associated with worse outcome (Chan 2009). The Edinburgh LT centre investigated the impact of perioperative renal dysfunction on posttransplant renal outcomes in AHF patients. They found that older age, female gender, hypertension, CSA and non-acetaminophen-induced AHF but not the severity of perioperative renal injury were predictive for the development of chronic kidney injury (Leithead 2011).
The results in patients transplanted for AHF have improved within the last decade due to the establishment of prognostic models, improved intensive care management and the option for LDLT which has a limited role in the US and Europe but plays a major role in Asia (Lo 2008). AHF was the indication for LDLT in more than 10% of the cohort reported by two Asian groups (Morioka 2007b, Lo 2004).
It has been reported that survival in patients with AHF is inferior to that of recipients with non-acute indications for LT in the first year but comparable in the long-term (Chan 2009, Wigg 2005). The US Acute Liver Failure Study Group found that two-year outcomes in initial survivors of AHF are generally good but that non-acetaminophen patients have a significantly lower survival, which may be related to pre-existing medical comorbidities (Fontana 2014).
LT is challenging due to a shortage of organs and a prolonged waiting-list time. The large disparity between the number of available deceased donor organs and recipients awaiting LT has created an ongoing debate regarding the appropriate selection criteria. A variety of approaches have been implemented to expand the organ donor pool including national efforts to expand deceased donor donation, split organ donations including LDLT, increased use of more elderly and obese donors and greater utilisation of expanded criteria donors. The rationale of allocation systems utilising the MELD score is to prioritise patients with severe liver dysfunction (“the sickest first”). This results in decreased waiting list mortality from 20 to 10% in the Eurotransplant region but also in a reduction of 1-year posttransplant survival by approximately 10%. A potential modification of the MELD allocation system or development of an improved prognostic scoring system is urgently warranted to optimise organ allocation in the future.
Due to the availability of antiviral drugs, the survival of patients undergoing LT for HBV infection has dramatically improved and has become comparable to or even better than the survival of patients with non-virus-related liver diseases. Efforts are aimed at withdrawing HBIG or implementing HBIG-free regimens, using only oral antivirals, in particular in patients at low risk of recurrence.
The availability of DAA all-oral combinations constitutes a substantial improvement in HCV therapy and in particular in patients formerly difficult-to-treat such as cirrhotic patients and in managing HCV infection after LT. However, HCV treatment pretransplant may result in lowering the priority of LT (MELD score reduction) without clinical improvement, thereby delaying potentially curative transplantation. Thus, robust predictors of improvement in hepatic function and quality of life are currently been investigated to identify patients with decompensated cirrhosis who benefit from DAA therapy prior to LT. Liver and renal impairment should be taken into account before treatment initiation. SVR rates in LT patients are comparable with nontransplant patients and can be achieved with excellent tolerability. SVR has also been shown to reduce the risk of renal impairment and cardiovascular-related morbidity. Some important issues still remain, such as the evaluation of safety of these new DAAs in patients with decompensated cirrhosis, the role of RBV in all-oral combinations and drug-drug interaction profiles, in particular after LT.
Expansion of the donor pool by including HCV positive organs in the DAA era could substantially decrease waiting times and mortality rates for patients listed for LT. Mounting data demonstrate the safety of using organs from HCV-infected donors with subsequent treatment of HCV in the recipient. However, use of HCV positive donors in HCV negative LT recipients may currently be restricted to urgent situations and necessitates a robust informed consent process.
Data about the frequency of disease recurrence in cholestatic and autoimmune liver diseases vary in the literature. Diagnosis of disease relapse in cholestatic and autoimmune liver disease is more challenging than in the non-transplant setting. Most studies report excellent medium-term and long-term results despite limited therapeutic options for disease recurrence.
LT in HCC patients provides excellent outcomes and low recurrence rates following the Milan criteria. Expansion of transplantation criteria beyond the Milan criteria has been discussed at length. The acceptance of a more liberal organ allocation policy may result in a further increase of the proportion of patients transplanted for HCC and denying the use of these organs to other patients for whom better results may be achieved. Recent developments in genomic and proteomic approaches may allow the identification of new biomarkers for prediction of HCC recurrence.
Sobriety for ≥6 months pretransplant is widely considered the prerequisite time for listing for LT although urgent cases may be referred to regional review boards for consideration of an exception to this general rule. There are few reliable predictors of relapse in alcoholic patients after LT. Survival rates in patients with alcohol-related liver disease are similar or even better when compared to the outcomes of patients who undergo transplant for other types of chronic liver disease. In contrast, survival is worse in patients with heavy alcohol consumption after LT.
The management of cardiovascular, renal, coagulopathic, cerebral and infectious complications in patients with AHF is clinically challenging. Prognostic models are helpful but not entirely accurate in predicting those who will require LT. Due to advances in intensive care medicine and surgical techniques, outcomes for patients with AHF have progressively improved over the last 2 decades.
CNI, at least at low doses, with or without other immunosuppressive drugs, have been so far the cornerstone of immunosuppressive regimens in a substantial proportion of LT patients. Much attention has been directed to reducing CNI-associated long-term complications. Cardiovascular comorbidities due to metabolic complications such as diabetes mellitus, dyslipidaemia, obesity, and arterial hypertension account for 30-70% of long-term morbidity. Current trends of immunosuppressive strategies include CNI-sparing or CNI-free protocols including MMF- and/or mTOR-based immunosuppressive regimens and corticosteroid-avoidance protocols. CNI delay with induction therapy for bridging the early postoperative phase should be considered especially in patients with high MELD scores. Finally, “individually tailored immunosuppressive” protocols may optimise drug efficacy, minimise drug toxicity and improve transplant outcome.
Abbas Z, Afzal R. Hepatitis E: when to treat and how to treat. Antivir Ther 2014;19(2):125-31.
Afdhal N, Everson GT, Calleja JL. Effect of viral suppression on hepatic venous pressure gradient in hepatitis C with cirrhosis and portal hypertension. J Viral Hepat 2017; 24(10):823-831.
Agarwal K, Castells L, Mullhaupt B, et al. Sofosbuvir/Velpatasvir for 12 weeks in genotype 1-4 HCV-infected liver transplant recipients. Hepatology 2017; 66(1), AASLD 2017, abstract 1069.
Akamatsu N, Sugawara Y, Kokudo N. Living-donor vs deceased-donor liver transplantation for patients with hepatocellular carcinoma. World J Hepatol 2014;6(9):626-31.
Alabraba E, Nightingale P, Gunson B, et al. A re-evaluation of the risk factors for the recurrence of primary sclerosing cholangitis in liver allografts. Liver Transpl 2009;15:330-40.
Angus PW, Strasser SI, Patterson S, et al. A randomized study to assess the safety and efficacy of adefovir dipivoxil substitution for hepatitis B immune globulin in liver transplantation patients receiving long-term low dose IM HBIG and lamivudine prophylaxis. Hepatology 2007;46:238A.
Aqel BA, Pungpapong S, Leise M, Werner KT, Chervenak AE, Watt KD, Murphy JL, Ryland K, Keaveny AP, McLemore R, Vargas HE. Multicenter experience using simeprevir and sofosbuvir with or without ribavirin to treat hepatitis C genotype 1 in patients with cirrhosis. Hepatology 2015;62(4):1004-12.
ANRS collaborative study group on hepatocellular carcinoma (ANRS CO22 HEPATHER, CO12 CirVir and CO23 CUPILT cohorts). Lack of evidence of an effect of direct-acting antivirals on the recurrence of hepatocellular carcinoma: Data from three ANRS cohorts. J Hepatol 2016;65(4):734-40.
Au JS, Navarro VJ, Rossi S. Drug-induced liver injury – its pathophysiology and evolving diagnostic tools. Aliment Pharmacol Ther 2011;34:11-20.
Bajjoka I, Hsaiky L, Brown K, Abouljoud M. Preserving renal function in liver transplant recipients with rabbit anti-thymocyte globulin and delayed initiation of calcineurin inhibitors. Liver Transpl 2008;14:66-72.
Baker TB. Living liver donation, donor safety, and social media: Preparing for a new frontier. Liver Transpl 2017;23(2):131-132.
Beavers KL, Sandler RS, Shrestha R. Donor morbidity associated with right lobectomy for living donor liver transplantation to adult recipients. Liver Transpl 2002;8:110-7.
Beckebaum S (a), Cicinnati V, Brokalaki E, Frilling A, Gerken G, Broelsch CE. CNI-sparing regimens within the liver transplant setting: experiences of a single center. Clin Transpl 2004;215-20.
Beckebaum S (b), Cicinnati VR, Broelsch CE. Future directions in immunosuppression. Transplant Proc 2004;36:574S-6S.
Beckebaum S, Cicinnati V, Gerken G. Current concepts for prophylaxis and treatment of hepatitis B reinfection after liver transplantation. Med Klin (Munich) 2008;103:190-7.
Beckebaum S, Sotiropoulos G, Gerken G, Cicinnati V. Hepatitis B and liver transplantation: 2008 update. Rev Med Virol 2009;19:7-29.
Beckebaum S, Iacob S, Klein CG, et al. Assessment of allograft fibrosis by transient elastography and noninvasive biomarker scoring systems in liver transplant patients. Transplantation 2010;89:983-93.
Beckebaum S, Cicinnati VR. Conversion to combined mycophenolate mofetil and low-dose calcineurin inhibitor therapy for renal dysfunction in liver transplant patients: never too late? Dig Dis Sci 2011;56:4-6.
Beckebaum S (a), Kabar I, Cicinnati VR. Hepatitis B and C in liver transplantation: new strategies to combat the enemies. Rev Med Virol 2013;23(3):172-93.
Beckebaum S (b), Cicinnati VR, Radtke A, Kabar I. Calcineurin inhibitors in liver transplantation – still champions or threatened by serious competitors? Liver Int 2013;33(5):656-65.
Beckebaum S (c), Iacob S, Radtke A, Kabar I, Cicinnati VR. Body weight may not be sufficient for reliable estimation of subcutaneous hepatitis B immunoglobulin dose requirement. American Journal of Transplantation 2013;13:1615-16.
Becker T, Foltys D, Bilbao I, et al. Patient outcomes in two steroid-free regimens using tacrolimus monotherapy after daclizumab induction and tacrolimus with mycophenolate mofetil in liver transplantation. Transplantation 2008;86:1689-94.
Belli LS, Duvoux C, Berenguer M, et al. ELITA consensus statements on the use of DAAs in liver transplant candidates and recipients. J Hepatol 2017;67(3):585-602. Bellomo R, Ronco C, Kellum JA, Mehta RL, Palevsky P. Acute renal failure – definition, outcome measures, animal models, fluid therapy and information technology needs: the Second International Consensus Conference of the Acute Dialysis Quality Initiative (ADQI) Group. Crit Care 2004;8 R204-2.
Benlloch S, Berenguer M, Prieto M, et al. De novo internal neoplasms after liver transplantation: increased risk and aggressive behavior in recent years? Am J Transplant 2004;4:596-604.
Bhartia B, Ward J, Guthrie JA, Robinson PJ. Hepatocellular carcinoma in cirrhotic livers: double-contrast thin-section MR imaging with pathologic correlation of explanted tissue. AJR Am J Roentgenol 2003;180:577-84.
Bhat M, Mara K, Dierkhising R, Watt KD. Gender, race and disease aetiology predict de novo malignancy risk following liver transplantation: Insights for future individualized cancer screening guidance. Transplantation 2018. doi: 10.1097/TP.0000000000002113. [Epub ahead of print].
Bittermann T, Hoteit MA, Abt PL, Forde KA, Goldberg D. Waiting time and explant pathology in transplant recipients with hepatocellular carcinoma: a novel study using national data. Am J Transplant 2014;14:1657-63.
Bizollon T, Ahmed SN, Radenne S, et al. Long term histological improvement and clearance of intrahepatic hepatitis C virus RNA following sustained viral response to interferon-ribavirin combination therapy in liver transplant patients with hepatitis C virus recurrence. Gut 2005;52:283-7.
Borg BB, Feng Z, Earl TM, Anderson CD. Hepatitis E in post-liver transplantation: is it time to routinely consider it? Clin Transplant 2016;30(9):975-9.
Bosch A, Dumortier J, Maucort-Boulch D, et al. Preventive administration of UDCA after liver transplantation for primary biliary cirrhosis is associated with a lower risk of disease recurrence. J Hepatol 2015;63(6):1449-58.
Brandhagen DJ. Liver transplantation for hereditary haemochromatosis. Liver Transpl 2001;7:663-7.
Broelsch CE, Whitington PF, Emond JC, et al. Liver transplantation in children from living related donors. Surgical techniques and results. Ann Surg 1991;214:428-37.
Buell JF, Gross TG, Woodle ES. Malignancy after transplantation.Transplantation 2005;15:S254-64.
Buis CI, Geuken E, Visser DS, Kuipers F, Haagsma EB, Verkade HJ, et al. Altered bile composition after liver transplantation is associated with the development of nonanastomotic biliary strictures. J Hepatol 2009;50:69-79.
Bundesärztekammer. Richtlinien für die Wartelistenführung und die Organvermittlung gem. § 16 Abs. 1 S. 1 Nrn. 2 u. 5 TPG. http://www.bundesaerztekammer.de/richtlinien/richtlinien/transplantationsmedizin/richtlinien-fuer-die-wartelistenfuehrung-und-die-organvermittlung/
Burra P, Lucey MR. Liver transplantation in alcoholic patients. Transpl Int 2005;18:491-8.
Burra P, Senzolo M, Adam R, et al. Liver transplantation for alcoholic liver disease in Europe: a study from the ELTR (European Liver Transplant Registry). Am J Transplant 2010;10:138-48.
Burra P, Germani G. Orthotopic liver transplantation In non-alcoholic fatty liver disease patients. Rev Recent Clin Trials. 2014;9(3):210-6.
Buti M, Mas A, Prieto M, et al. Adherence to lamivudine after an early withdrawal of hepatitis B immune globulin plays an important role in the long-term prevention of hepatitis B virus recurrence. Transplantation 2007;84:650-4.
Bzowej N, Nelson DR, Terrault NA, et al. PHOENIX: A randomized controlled trial of peginterferon alfa-2a plus ribavirin as a prophylactic treatment after liver transplantation for hepatitis C virus. Liver Transpl 2011;17:528-38.
Cai CJ, Lu MQ, Chen YH, Zhao H, Li MR, Chen GH. Clinical study on prevention of HBV re-infection by entecavir after liver transplantation. Clin Transplant. Clin Transplant 2012;26(2):208-15.
Cantarovich M, Tzimas GN, Barkun J, Deschênes M, Alpert E, Tchervenkov J. Efficacy of mycophenolate mofetil combined with very low-dose cyclosporine microemulsion in long-term liver-transplant patients with renal dysfunction. Transplantation 2003;76:98-102.
Carbone M, Neuberger J. Liver transplantation in PBC and PSC: indications and disease recurrence. Clin Res Hepatol Gastroenterol 2011;35:446-54.
Carbone M, Neuberger JM. Autoimmune liver disease, autoimmunity and liver transplantation. J Hepatol 2014;60(1):210-23.
Carenco C, Assenat E, Faure S, Duny Y, Danan G, Bismuth M, Herrero A, Jung B, Ursic-Bedoya J, Jaber S, Larrey D, Navarro F, Pageaux GP. Tacrolimus and the risk of solid cancers after liver transplant: a dose effect relationship. Am J Transplant 2015;15(3):678-86.
Carlisle EM, Testa G. Adult to adult living related liver transplantation: Where do we currently stand? World J Gastroenterol 2012 Dec 14;18(46):6729-36.
Fernández Carrillo C, Crespo G, et al. Successful continuation of HCV treatment after liver transplantation. Transplantation 2017;101(5):1009-12.
Caroti L, Zanazzi M, Paudice N, et al. Conversion from calcineurin inhibitors to everolimus with low-dose cyclosporine in renal transplant recipients with squamous cell carcinoma of the skin. Transplant Proc 2012;44(7):1926-27.
Carmo J, Marques S, Mateus É, et al. Ribavirin for chronic hepatitis E in liver-transplant setting: A safe and highly effective therapy. J Clin Gastroenterol 2016;50(7):608.
Castells L, Vargas V, Aleende H, et al. Combined treatment with pegylated interferon (alpha-2b) and ribavirin in the acute phase of hepatitis C virus recurrence after liver transplantation. J Hepatol 2005;43:53-9.
Chaillon A, Sirinelli A, De MA, Nicand E, d’Alteroche L, Goudeau A. Sustained virologic response with ribavirin in chronic hepatitis E virus infection in heart transplantation. J Heart Lung Transplant 2011;30(7):841-3.
Chalasani N, Manzarbeitia C, Ferenci P, et al. Peginterferon alfa-2a for hepatitis C after liver transplantation: two randomized, controlled trials. Hepatology 2005;41:289-98.
Chalaye J, Costentin CE, Luciani A, et al. Positron emission tomography/computed tomography with 18F-fluorocholine improve tumour staging and treatment allocation in patients with hepatocellular carcinoma. J Hepatol 2018; pii: S0168-8278(18)30136-3. doi: 10.1016/j.jhep.2018.02.018. [Epub ahead of print].
Chan G, Taqi A, Marotta P, et al. Long-term outcomes of emergency liver transplantation for acute liver failure. Liver Transpl 2009;15:1696-702.
Charatcharoenwitthaya P, Pimentel S, Talwalkar, et al. Long-term survival and impact of ursodeoxycholic acid treatment for recurrent primary biliary cirrhosis after liver transplantation. Liver Transpl 2007;13:1236-45.
Charlton M (a), Everson GT, Flamm SL, et al. Ledipasvir and sofosbuvir plus ribavirin for treatment of HCV infection in patients with advanced liver disease. Gastroenterology 2015; 149: 649–59.
Charlton M (b), Gane E, Manns MP et al. Sofosbuvir and ribavirin for treatment of compensated recurrent hepatitis C virus infection after liver transplantation. Gastroenterology 2015;148(1):108-17.
Choi PC, Kim HJ, Choi WH, et al. Model for end-stage liver disease, model for end-stage liver disease-sodium and Child-Turcotte-Pugh scores over time for the prediction of complications of liver cirrhosis. Liver Int 2009;29:221-6.
Cholongitas E, Shusang V, Papatheodoridis GV, et al. Risk factors for recurrence of primary sclerosing cholangitis after liver transplantation. Liver Transpl 2008;14:138-43.
Cholongitas E, Goulis I, Antoniadis N, et al. New nucleos(t)ide analogue monoprophylaxis after cessation of hepatitis B immunoglobulin is effective against hepatitis B recurrence. Transpl Int 2014;27(10):1022-8.
Cicinnati VR (a), Yu Z, Klein CG, et al. Clinical trial: switch to combined mycophenolate mofetil and minimal dose calcineurin inhibitor in stable liver transplant patients-assessment of renal and allograft function, cardiovascular risk factors and immune monitoring. Aliment Pharmacol Ther 2007;26:1195-208.
Coilly A, Roche B, Botta-Fridlund D, et al. Efficacy and safety of protease inhibitors for severe hepatitis C recurrence after liver transplantation: a first multicentric experience. J Hepatol 2012; 56 (Suppl.2): S21.
Coilly A, Dumortier J, Botta-Fridlund D, et al. Sustained virological response after protease inhibitor-based therapy for hepatitis C recurrence after liver transplantation: A multicentric European experience. Hepatology 2013; 58 (Suppl 1): 316A.
Coilly A, Fougerou C, De Ledinghen V, et al. G15: the association of sofosbuvir and daclatasvir for treating severe recurrence of HCV infection after liver transplantation: results from a large french prospective multicentric ANRS CO23 CUPILT cohort. J Hepatol 2015; 62: S236–7.
Coilly A, Roche B, Duclos-Vallée JC, Samuel D. News and challenges in the treatment of hepatitis C in liver transplantation. Liver Int 2016;36 Suppl 1:34-42.
Copaci I, Lupescu I, Caceaune E, Chiriac G, Ismail G. Noninvasive Markers of improvement of liver steatosis achieved by weight reduction in patients with nonalcoholic fatty liver disease. Rom J Intern Med 2015;53(1):54-62.
Cornberg M, Protzer U, Petersen J, et al. Prophylaxis, diagnosis and therapy of hepatitis B virus infection – the German guideline. Z Gastroenterol 2011;49:871-930.
Craig DG, Ford AC, Hayes PC, Simpson KJ. Systematic review: prognostic tests of paracetamol-induced acute liver failure. Aliment Pharmacol Ther 2010;31:1064-76.
Créput C, Blandin F, Deroure B, et al. Long-term effects of calcineurin inhibitor conversion to mycophenolate mofetil on renal function after liver transplantation. Liver Transpl 2007;13:1004-10.
Cross T, Jothimani D, Heneghan MA, Harrison PM. Non-invasive assessment of fibrosis in liver grafts due to hepatitis C virus recurrence. Clin Transplant 2011;25:345-51.
Curry MP, O’Leary JG, Bzowej N, et al. ASTRAL-4 Investigators. Sofosbuvir and velpatasvir for HCV in patients with decompensated cirrhosis. N Engl J Med 2015;373(27):2618-28. Daly I, Jain A, Reyes J, Fung J. Mycophenolate mofetil for treatment of chronic rejection in liver allograft under tacrolimus. Transplant Proc 2002;34:1503.
Dar FS, Faraj W, Zaman MB, Bartlett A, et al. Outcome of liver transplantation in hereditary haemochromatosis. Transpl Int 2009;22:717-24.
Darwish Murad S, Metselaar HJ. The invasion of fatty liver disease in liver transplantation. Transpl Int 2015; 29(4):416-7.
Demetris AJ, Murase N, Lee RG, et al. Chronic rejection. A general overview of histopathology and pathophysiology with emphasis on liver, heart and intestinal allografts. Ann Transplant 1997;2:27-44.
Demetris AJ, Bellamy C, Hubscher SG, et al. 2016 Comprehensive update of the Banff Working Group on liver allograft pathology: introduction of antibody-mediated rejection. Am J Transplant 2016; 16: 2816-35.
De Simone P (a), Fagiuoli S, Cescon M, De Carlis L, Tisone G, Volpes R, Cillo U; Consensus Panel. Use of everolimus in liver transplantation: Recommendations from a Working Group. Transplantation 2016; 101(2):239-251.
De Simone P (b), Romagnoli R, Tandoi F, et l. Early introduction of subcutaneous Hepatitis B Immunoglobulin following liver transplantation for Hepatitis B virus infection: A prospective, multicenter study. Transplantation. 2016;100(7):1507-12.
Dew MA, DiMartini AF, Steel J, et al. Meta-analysis of risk for relapse to substance use after transplantation of the liver or other solid organs. Liver Transpl 2008;14:159-72.
Di Benedetto F, Tarantino G, Montalti R, et al. Sorafenib before liver transplantation for hepatocellular carcinoma: risk or give up. Transpl Int 2011; 24(11):e97.
DiMartini A, Dew MA, Fitzgerald MG, Fontes P. Clusters of alcohol use disorders diagnostic criteria and predictors of alcohol use after liver transplantation for alcoholic liver disease. Psychosomatics 2008;49:332-40.
Duffy JP, Vardanian A, Benjamin E, et al. Liver transplantation criteria for hepatocellular carcinoma should be expanded: a 22-year experience with 467 patients at UCLA. Ann Surg 2007;246:502-9.
Dutkowski P, Oberkofler CE, Béchir M, et al. The model for end-stage liver disease allocation system for liver transplantation saves lives, but increases morbidity and cost: a prospective outcome analysis. Liver Transpl 2011;17:674-84.
Duvoux C, Roudot-Thoraval F, Decaens T,et al; Liver Transplantation French Study Group. Liver transplantation for hepatocellular carcinoma: a model including α-fetoprotein improves the performance of Milan criteria. Gastroenterology 2012;143(4):986-94.
EASL Clinical Practical Guidelines: management of alcoholic liver disease. European Association for the Study of Liver. J Hepatol 2012;57(2):399-420.
EASL Clinical Practice Guidelines: Liver transplantation. J Hepatol 2015, http://dx.doi.org/10.1016/j.jhep.2015.10.006
EASL Recommendations on Treatment of Hepatitis C 2018. J Hepatol 2018, https://doi.org/10.1016/j.jhep.2018.03.026. [Epub ahead of print].
EASL Clinical Practice Guidelines on the Management of Hepatitis B Virus Infection. J Hepatol 2017; 67:370–98. http://www.easl.eu/medias/cpg/management-of-hepatitis-B-virus-infection/English-report.pdf.
EASL Clinical Practical Guidelines on the Management of Acute (Fulminant) Liver Failure. J Hepatol 2017; 66:1047–81.
EASL Clinical Practice Guidelines on hepatitis E virus infection. J Hepatol 2018; 68 1256–1271. https://www.journal-of-hepatology.eu/article/S0168-8278(18)30155-7/pdf.
Ecker BL, Hoteit MA, Forde KA, et al. Patterns of discordance between pretransplant imaging stage of hepatocellular carcinoma and posttransplant pathologic stage: A contemporary appraisal of the milan criteria. Transplantation 2018; 102(4):648-55.
Egawa H, Sakisaka S, Teramukai S, Sakabayashi S, Yamamoto M, Umeshita K, Uemoto S. Long-term outcomes of living-donor liver transplantation for primary biliary cirrhosis: A Japanese multicenter Study. Am J Transplant 2016;16(4):1248-57.
Eid AJ, Razonable RR. New developments in the management of cytomegalovirus infection after solid organ transplantation. Drugs 2010;70:965-81.
El-Sherif O, Jiang ZG, Tapper EB, et al. Baseline factors associated with improvements in decompensated cirrhosis after direct-acting antiviral therapy for hepatitis C virus infection. Gastroenterology 2018. pii: S0016-5085(18)30314-7. doi: 10.1053/j.gastro.2018.03.022. [Epub ahead of print].
Erim Y, Böttcher M, Dahmen U, Beck O, Broelsch CE, Helander A. Urinary ethyl glucuronide testing detects alcohol consumption in alcoholic liver disease patients awaiting liver transplantation. Liver Transpl 2007;13:757-61.
Euvrard S, Morelon E, Rostaing L, et al. Sirolimus and secondary skin-cancer prevention in kidney transplantation. N Engl J Med 2012;367(4):329-9.
Fairfield C, Penninga L, Powell J, Harrison EM, Wigmore SJ. Glucocorticosteroid-free versus glucocorticosteroid-containing immunosuppression for liver transplanted patients. Cochrane Database Syst Rev 2018;9:4:CD007606. doi: 10.1002/14651858.CD007606.pub4. [Epub ahead of print].Faisal N, Renner EL. Recurrence of autoimmune liver diseases after liver transplantation. World J Hepatol 2015; 7(29): 2896–2905.
Feld JJ, Jacobson IM, Hézode C, et al. ASTRAL-1 Investigators. Sofosbuvir and velpatasvir for HCV genotype 1, 2, 4, 5, and infection. N Engl J Med 2015;373(27):2599-607.
Feng S, Goodrich NP, Bragg-Gresham JL, et al. Characteristics associated with liver graft failure: the concept of a donor risk index. Am J Transplant 2006;6:783-90.
Fevery J, Henckaerts L, Van Oirbeek R, et al. Malignancies and mortality in 200 patients with primary sclerosering cholangitis: a long-term single-centre study. Liver Int 2012; 32:214-22.
Filipponi F, Callea F, Salizzoni M, et al. Double-blind comparison of hepatitis C histological recurrence rate in HCV+ liver transplant recipients given basiliximab + steroids or basiliximab + placebo, in addition to cyclosporine and azathioprine. Transplantation 2004;78:1488-95.
Finkenstedt A, Graziadei IW, Oberaigner W, et al. Extensive surveillance promotes early diagnosis and improved survival of de novo malignancies in liver transplant recipients. Am J Transplant 2009; 9:2355-61.
Fischer L, Klempnauer J, Beckebaum S, et al. A randomized, controlled study to assess the conversion from calcineurin-inhibitors to everolimus after liver transplantation-PROTECT. Am J Transplant 2012;12:1855-65.
Flemming JA, Yang JD, Vittinghoff E, Kim WR, Terrault NA. Risk prediction of hepatocellular carcinoma in patients with cirrhosis: the ADRESS-HCC risk model. Cancer 2014; 15;120(22):3485-93.
Flemming JA, Kim WR, Brosgart CL, Terrault NA. Reduction in liver transplant wait-listing in the era of direct-acting antiviral therapy. Hepatology 2017;65(3):804-12.
Fontana RJ, Ellerbe C, Durkalski VE, et al. Two-year outcomes in initial survivors with acute liver failure: results from a prospective, multicenter study. Liver Int 2015;35(2):370-80. doi: 10.1111/liv.12632. Epub 2014 Jul 28.
Forns X, Fontana RJ, Moonka D, et al. Initial evaluation of the sofosbuvir compassionate use program for patients with severe recurrent HCV following liver transplantation. Hepatology 2013;58, Suppl.1:732A.
Fried, M., DiBisceglie, A., Vierling, J.M., Gane, E.J., Nevens, F., Strasser, S.I. et al. TURQUOISE-II: regimens of ABT-450/r/ombitasvir and dasabuvir with ribavirin achieve high SVR12 rates in HCV genotype 1-infected patients with cirrhosis, regardless of baseline characteristics. Hepatology 2014;60:1145A.
Frilling A, Malago M, Weber F, et al. Liver transplantation for patients with metastatic endocrine tumours. Liver Transpl 2006;12:1089-96.
Fujiki M, Aucejo F, Kim R. General overview of neo-adjuvant therapy for hepatocellular carcinoma before liver transplantation: necessity or option? Liver Int 2011;31:1081-9.
Fung JJ, Jain A, Kwak EJ, Kusne S, Dvorchik I, Eghtesad B. De novo malignancies after liver transplantation: a major cause of late death. Liver Transpl 2001;7:S109-18.
Fung J, Cheung C, Chan SC, Yuen MF. Entecavir monotherapy is effective in suppressing hepatitis B virus after liver transplantation. Gastroenterology 2011;141:1212-9.
Galante A, Pischke S, Polywka S,et et al. Relevance of chronic hepatitis E in liver transplant recipients: a real-life setting. Transpl Infect Dis 2015;17(4):617-22.
Gane E, Strasser SI, Patterson S, et al. A prospective study on the safety and efficacy of lamivudine and adefovir dipivoxil prophylaxis in HBsAg positive liver transplantation candidates. Hepatology 2007;46:479A.
Gane EJ, Patterson S, Strasser SI, McCaughan GW, Angus PW. Combination of lamivudine and adefovir without hepatitis B immune globulin is safe and effective prophylaxis against hepatitis B virus recurrence in hepatitis B surface antigen positive liver transplant candidates. Liver Transpl 2013;19(3):268-74.
Gane EJ, Robson RA, Bonacini M et al. Safety, anti-viral efficacy and pharmacokinetics (PK) of sofosbuvir (SOF) in patients with severe renal impairment. Hepatology 2014;60:667a-667.
Garcia CE, Ribeiro HB, Garcia RL, et al. Mycophenolate mofetil in stable liver transplant patients with calcineurin inhibitor-induced renal impairment: single-center experience. Transplant Proc 2003;35:1131-2.
Gedaly R, Daily MF, Davenport D, et al. Liver transplantation for the treatment of liver metastases from neuroendocrine tumours: an analysis of the UNOS database. Arch Surg 2011;146:953-8.
Geissler EK, Schnitzbauer AA, Zülke C, et al. Sirolimus use in liver transplant recipients with hepatocellular carcinoma: A randomized, multicenter, open-label phase 3 trial. Transplantation 2016;100(1):116-25.
Gonwa TA, Mai ML, Melton LB, Hays SR, et al. End-stage renal disease (ESRD) after orthotopic liver transplantation (OLTX) using calcineurin-based immunotherapy: risk of development and treatment. Transplantation 2001;72:1934-9.
Gonzalez-Koch A, Czaja AJ, Carpenter HA, et al. Recurrent autoimmune hepatitis after orthotopic liver transplantation. Liver Transpl 2001;7:302-10.
Goss JA, Shackleton CR, Farmer DG, et al. Orthotopic liver transplantation for primary sclerosing cholangitis. A 12-year single center experience. Ann Surg 1997;225:472-81.
Graziadei IW, Wiesner RH, Marotta PJ, et al. Long-term results of patients undergoing liver transplantation for primary sclerosing cholangitis. Hepatology 1999;30:1121-7.
Graziadei IW, Schwaighofer H, Koch R, et al. Long-term outcome of endoscopic treatment of biliary strictures after liver transplantation. Liver Transpl 2006;12:718-25.
Gu YH, Du JX, Ma ML. Sirolimus and non-melanoma skin cancer prevention after kidney transplantation: A meta-analysis. Asian Pac J Cancer Prev 2012;13(9):4335-9.
Guba M, von Breitenbuch P, Steinbauer M, et al. Rapamycin inhibits primary and metastatic tumour growth by antiangiogenesis: involvement of vascular endothelial growth factor. Nat Med 2002;8:128-35.
Guichelaar MM, Kendall R, Malinchoc M, Hay JE. Bone mineral density before and after OLT: long-term follow-up and predictive factors.Liver Transpl 2006;12(9):1390-402.
Guichelaar MM, Schmoll J, Malinchoc M, Hay JE. Fractures and avascular necrosis before and after orthotopic liver transplantation: long-term follow-up and predictive factors. Hepatology 2007;46(4):1198-207.
Haber PS, McCaughan GW. “I’ll never touch it again, doctor!”-harmful drinking after liver transplantation. Hepatology 2007;46:1302-4.
Haga H, Miyagawa-Hayashino A, Taira K, Morioka D, Egawa H, Takada Y, Manabe T, Uemoto S. Histological recurrence of autoimmune liver diseases after living-donor liver transplantation. Hepatol Res 2007;37 Suppl 3:S463–S69.
Hanouneh IA, Macaron C, Lopez R. Risk of colonic neoplasia after liver transplantation for primary sclerosing cholangitis. Inflamm Bowel Dis 2012;18:269-74.
Harper SJ, Gelson W, Harper IG, Alexander GJ, Gibbs P. Switching to sirolimus-based immune suppression after liver transplantation is safe and effective: a single-center experience. Transplantation 2011;91:128-32.
Hashimoto E, Shimada M, Noguchi S, et al. Disease recurrence after living liver transplantation for primary biliary cirrhosis: a clinical and histological follow-up study. Liver Transpl 2001;7:588-95.
Heimbach JK. Successful liver transplantation for hilar cholangiocarcinoma. Curr Opin Gastroenterol. 2008;24:384-8.
Hernandez Mdel P, Martin P, Simkins J. Infectious complications after liver transplantation. Gastroenterol Hepatol 2015;11(11):741-53.
Hiatt JR, Carmody IC, Busuttil RW. Should we expand the criteria for hepatocellular carcinoma with living-donor liver transplantation?-no, never. J Hepatol 2005;43:573-7.
Hilke A, von Rothkirch Gregor, Eik V, Determination of ethyl glucuronide in hair for detection of alcohol consumption in patients after liver transplantation. Ther Drug Monit 2015;37(4):539-45.
Hinz M, Wree A, Jochum C et al High age and low sodium urine concentration are associated with poor survival in patients with hepatorenal syndrome. Ann Hepatol 2013;12(1):92-9.
Ho GT, Seddon AJ, Therapondos G, Satsangi J,Hayes PC. The clinical course of ulcerative colitis after orthotopic liver transplantation for primary sclerosing cholangitis: further appraisal of immunosuppression post transplantation. Eur J Gastroenterol Hepatol 2005;17:1379-85.
Hong JC, Jones CM, Duffy JP, et al. Comparative analysis of resection and liver transplantation for intrahepatic and hilar cholangiocarcinoma: a 24-year experience in a single center. Arch Surg 2011;146:683-9.
Hoyos S, Escobar J, Cardona D, et al. Factors associated with recurrence and survival in liver transplant patients with HCC – a single center retrospective study. Ann Hepatol 2015;14(1):58-63.
Hüsing A, Cicinnati VR, Beckebaum S et al. Endoscopic ultrasound: valuable tool for diagnosis of biliary complications in liver transplant recipients? Surg Endosc 2015;29(6):1433-8.
Humar A, Limaye AP, Blumberg EA, et al. Extended valganciclovir prophylaxis in D+/R- kidney transplant recipients is associated with long-term reduction in cytomegalovirus disease: two-year results of the IMPACT study Transplantation 2010; 27;90:1427-31.
Hüsing A (a), Schmidt M, Beckebaum S, Cicinnati VR, Koch R, Thölking G, Stella J, Heinzow H, Schmidt HH, Kabar I. Long-term renal function in liver transplant recipients after conversion from calcineurin inhibitors to mTOR Inhibitors. Ann Transplant 2015 26;20:707-13.
Hüsing A (b), Cicinnati VR, Maschmeier M, Schmidt HH, Wolters HH, Beckebaum S, Kabar I. Complications after endoscopic sphincterotomy in liver transplant recipients: A retrospective single-centre study. Arab J Gastroenterol 2015;16(2):46-9.
Hytiroglou P, Gutierrez JA, Freni M, et al. Recurrence of primary biliary cirrhosis and development of autoimmune hepatitis after liver transplant: A blind histologic study. Hepatol Res 2009;39:577-84.
Iacob S, Cicinnati VR, Dechêne A, et al. Genetic, immunological and clinical risk factors for biliary strictures following liver transplantation. Liver Int 2012;32(8):1253-61.
Iida T, Ogura Y, Oike F, Hatano E, Kaido T, Egawa H, Takada Y, Uemoto S. Surgery-related morbidity in living donors for liver transplantation. Transplantation 2010;89:1276–82.
Jacob DA, Neumann UP, Bahra M, et al. Long-term follow-up after recurrence of primary biliary cirrhosis after liver transplantation in 100 patients. Clin Transplant 2006;20:211-20.
Jelic S, Sotiropoulos GC; ESMO Guidelines Working Group. Hepatocellular carcinoma: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up. Ann Oncol 2010;21:59-64.
Jeong SW, Choi Y, Kim JW. Management of viral hepatitis in liver transplant recipients. Clin Mol Hepatol 2014;20(4):338-44.
Jimenez C, Marques E, Manrique A, al. Incidence and risk factors of development of lung tumours after liver transplantation. Transplant Proc 2005;37:3970-2.
Jiménez-Pérez M, González-Grande R, Mostazo Torres J, González Arjona C, Javier Rando-Muñoz F. Management of hepatitis B virus infection after liver transplantation. World J Gastroenterol 2015; 21(42): 12083–90.
Jørgensen KK, Lindström L, Cvancarova M, et al. Colorectal neoplasia in patients with primary sclerosing cholangitis undergoing liver transplantation: a Nordic multicenter study. Scand J Gastroenterol 2012;47(8-9):1021-9.
Jørgensen KK, Lindström L, Cvancarova M et al. Immunosuppression after liver transplantation for primary sclerosing cholangitis influences activity of inflammatory bowel disease. Clin Gastroenterol Hepatol 2013;11(5):517-23.
John PR, Thuluvath PJ. Outcome of patients with new-onset diabetes mellitus after liver transplantation compared with those without diabetes mellitus. Liver Transpl 2002;8:708-13.
Kabar I, Cicinnati VR, Beckebaum S, et al. Use of paclitaxel-eluting balloons for endotherapy of anastomotic strictures following liver transplantation. Endoscopy 2012;44(12):1158-60.
Kahn J, Wagner D, Homfeld N, Müller H, Kniepeiss D, Schemmer P. Both sarcopenia and frailty determine suitability of patients for liver transplantation-A systematic review and meta-analysis of the literature. Clin Transplant 2018;32(4):e13226. doi: 10.1111/ctr.13226. [Epub ahead of print].
Kaltenborn A, Salinas R, Jäger MD, Lehner F, Sakirow L, Klempnauer J, Schrem H. Model of end-stage liver disease score and derived variants lack prognostic ability after liver transplantation. Ann Transplant 2015;20:441-8.
Kamar N (a), Abravanel F, Selves J, et al. Influence of immunosuppressive therapy on the natural history of genotype 3 hepatitis-E virus infection after organ transplantation. Transplantation 2010;89(3):353-60.
Kamar N (b), Rostaing L, Abravanel F,et al. Ribavirin therapy inhibits viral replication on patients with chronic hepatitis e virus infection. Gastroenterology 2010.;139(5):1612-8.
Kamar N (c) Rostaing L, Abravanel F,et al. Pegylated interferon-alpha for treating chronic hepatitis E virus infection after liver transplantation. Clin Infect Dis 2010;50(5):e30-e3.
Kamar N, Garrouste C, Haagsma EB, et al. Factors associated with chronic hepatitis in patients with hepatitis E virus infection who have received solid organ transplants. Gastroenterology 2011;140(5):1481-9.
Kamar N, Izopet J, Tripon S, Bismuth M, Hillaire S, Dumortier J, Radenne S, Coilly A, Garrigue V, D’Alteroche L, Buchler M, Couzi L, Lebray P, Dharancy S, Minello A, Hourmant M, Roque-Afonso AM, Abravanel F, Pol S, Rostaing L, Mallet V. Ribavirin for chronic hepatitis E virus infection in transplant recipients. N Engl J Med 2014;370(12):1111-20.
Kamdar KY, Rooney CM, Heslop HE. Posttransplant lymphoproliferative disease following liver transplantation. Curr Opin Organ Transplant 2011;16:274-80.
Kapoor D, Guptan RC, Wakil SM, et al. Beneficial effects of lamivudine in hepatitis B virus-related decompensated cirrhosis. J Hepatol 2000;33:308-12.
Kapoor VK. Bile duct injury repair – earlier is not better. Front Med 2015: 9(4):508-11.
Karlas T, Hartmann J, Weimann A, et al. Prevention of lamivudine-resistant hepatitis B recurrence after liver transplantation with entecavir plus tenofovir combination therapy and perioperative hepatitis B immunoglobulin only. Transpl Infect Dis 2011;13:299-302.
Kasturi KS, Chennareddygari S, Mummadi RR. Effect of bisphosphonates on bone mineral density in liver transplant patients: a meta-analysis and systematic review of randomized controlled trials. Transpl Int 2010;23(2):200-7.
Kawahara T, Asthana S, Kneteman NM. m-TOR inhibitors: What role in liver transplantation? J Hepatol 2011;55(6):1441-51.
Kawasaki S, Makuuchi M, Matsunami H, et al. Living related liver transplantation in adults. Ann Surg 1998;227:269-74.
Kemmer N, Kaiser T, Zacharias V, Neff GW. Alpha-1-antitrypsin deficiency: outcomes after liver transplantation. Transplant Proc 2008;40:1492-4.
Khalaf H, Alsuhaibani H, Al-Sugair A et al. Use of yttrium-90 microsphere radioembolization of hepatocellular carcinoma as downstaging and bridge before liver transplantation: a case report. Transplant Proc 2010;42:994-8.
Kim JM, Kwon CH, Joh JW, Ha YE, Sinn DH, Choi GS, Peck KR, Lee SK. Oral valganciclovir as a preemptive treatment for cytomegalovirus (CMV) Infection in CMV-seropositive liver transplant recipients. PLoS One 2015; 10(5):e0123554.doi: 10.1371/journal.pone.0123554. eCollection 2015.
Kneteman NM, Oberholzer J, Al Saghier M, et al. Sirolimus-based immunosuppression for liver transplantation in the presence of extended criteria for hepatocellular carcinoma. Liver Transpl 2004;10:1301-11.
Knight SR, Friend PJ, Morris PJ. Role of transplantation in the management of hepatic malignancy. Br J Surg 2007;94:1319-30.
Knighton S, Agarwal K, Heneghan MA, et al. A pharmacist delivered stratified conversion protocol from hepatitis B immunoglobulin (HBIG) to tenofovir or entecavir is efficacious, safe and cost-effective for prevention of recurrence of hepatitis B virus (HBV) in liver transplant (LT) recipients. Hepatology 2012;54:619A.
Konrad T, Steinmüller T, Vicini P, et al. Regulation of glucose tolerance in patients after liver transplantation: impact of cyclosporin versus tacrolimus therapy. Transplantation 2000;69:2072-8.
Kotton CN, Kumar D, Caliendo AM, et al. Updated international consensus guidelines on the management of cytomegalovirus in solid-organ transplantation. Transplantation Society International CMV Consensus Group. Transplantation 2013;96(4):333-60.
Krinsky GA, Lee VS, Theise ND, et al. Transplantation for hepatocellular carcinoma and cirrhosis: sensitivity of magnetic resonance imaging. Liver Transpl 2002;8:1156-64.
Kumar S, Jacobson IM. Antiviral therapy with nucleotide polymerase inhibitors for chronic hepatitis C. J Hepatol 2014;61(1S):S91-7.
Kwo P, Ghabril M, Lacerda M, et al. Use of telaprevir plus PEG interferon/ribavirin for null responders post OLT with advanced fibrosis/cholestatic hepatitis C. J Hepatol 2012;56 Suppl.2:S86.
Kwo PY, Mantry PS, Coakley E, et al. An interferon-free antiviral regimen for HCV after liver transplantation. N Engl J Med 2014;371(25):2375-82.
Kwong AJ, Lai JC, Dodge JL, Roberts JP. Outcomes for liver transplant candidates listed with low model for end-stage liver disease score. Liver Transpl 2015;21(11):1403-9.
Kwong A, Kim WR, Mannalithara A, Heo NY, Udompap P, Kim D. Decreasing mortality and disease severity in hepatitis C patients awaiting liver transplantation in the United States. Liver Transpl 2017. doi: 10.1002/lt.24973. [Epub ahead of print].
Lange CM, Bojunga J, Hofmann WP, et al. Severe lactic acidosis during treatment of chronic hepatitis B with entecavir in patients with impaired liver function. Hepatology 2009; 50:2001-6.
Lee BP, Mehta N, Platt L, et al. Outcomes of early liver transplantation for patients with severe alcoholic hepatitis. Gastroenterology 2018; pii: S0016-5085(18)30442-6. doi: 10.1053/j.gastro.2018.04.009. [Epub ahead of print].
Legrand-Abravanel F, Kamar N, Sandres-Saune K, Garrouste C, Dubois M, Mansuy JM, Muscari F, Sallusto F, Rostaing L, Izopet J. Characteristics of autochthonous hepatitis E virus infection in solid-organ transplant recipients in France. J Infect Dis 2010;202(6):835-44.
Leithead JA, Ferguson JW, Bates CM, Davidson JS, Simpson KJ, Hayes PC. Chronic kidney disease after liver transplantation for acute liver failure is not associated with perioperative renal dysfunction. Am J Transplant 2011;11:1905-15.
Lenci I, Marcuccilli F, Tisone G, Di Paolo D,et al. Total and covalently closed circular DNA detection in liver tissue of long-term survivors transplanted for HBV-related cirrhosis. Dig Liver Dis 2010;42(8):578-84.
Lerut J, Bonaccorsi-Riani E, Finet P, Gianello P. Minimization of steroids in liver transplantation. Transpl Int 2009; 22:2-19.
Levitsky J, Thudi K, Ison MG, Wang E, Abecassis M. Alemtuzumab induction in non-hepatitis C positive liver transplant recipients. Liver Transpl 2011;17:32-7.
Levitsky J, Verna EC, O'Leary JG, et al. Perioperative Ledipasvir-Sofosbuvir for HCV in Liver-Transplant Recipients. N Engl J Med 2016;375(21):2106-2108.
Liang W, Wang D, Ling X, et al. Sirolimus-based immunosuppression in liver transplantation for hepatocellular carcinoma: A meta-analysis. Liver Transpl 2012;18(1):62-9.
Liermann Garcia RF, Evangelista Garcia C, McMaster P, Neuberger J. Transplantation for primary biliary cirrhosis: retrospective analysis of 400 patients in a single center. Hepatology 2001;33:22-7.
Lin M, Mittal S, Sahebjam F, Rana A, Sood GK. Everolimus with early withdrawal or reduced-dose Calcineurin-Inhibitors improves renal function in Liver Transplant Recipients: A systematic review and meta-analysis. Clin Transplant 2016, doi: 10.1111/ctr.12872. [Epub ahead of print].
Lindström L, Jørgensen KK, Boberg KM et al. Risk factors and prognosis for recurrent primary sclerosing cholangitis after liver transplantation: a Nordic Multicenter Study. Scand J Gastroenterol. 2018 Mar;53(3):297-304.
Lisotti A, Fusaroli P, Caletti G. Role of endoscopy in the conservative management of biliary complications after deceased donor liver transplantation. World J Hepatol 2015;7(30):2927-32.
Liu X, Ling Z, Li L, Ruan B. Invasive fungal infections in liver transplantation. Int J Infect Dis 2011;15:e298-304.
Llado L, Fabregat J, Castellote J, et al. Impact of immunosuppression without steroids on rejection and hepatitis C virus evolution after liver transplantation: results of a prospective randomized study. Liver Transpl 2008;14:1752-60.
Lo CM, Fan ST, Liu CL, et al. Lessons learned from one hundred right lobe living donor liver transplants. Ann Surg 2004;240:151-8.
Lo CM, Liu CL, Lau GK, Chan SC, Ng IO, Fan ST. Liver transplantation for chronic hepatitis B with lamivudine-resistant YMDD mutant using add-on adefovir dipivoxil plus lamivudine. Liver Transpl 2005;11:807-13.
Lo CM. Liver transplantation for acute liver failure: not too early but never too late. Liver Transpl 2008;14:1243-4.
Malhotra N, Beaton MD. Management of non-alcoholic fatty liver disease in 2015. World J Hepatol 2015;7(30):2962-7.
Mallet V, Nicand E, Sultanik P, Chakvetadze C, Tesse S, Thervet E, Mouthon L, Sogni P, Pol S. Brief communication: case reports of ribavirin treatment for chronic hepatitis E. Ann Intern Med 2010;153(2):85-9.
Manns M, Samuel D, Gane EJ et al. Ledipasvir and sofosbuvir plus ribavirin in patients with genotype 1 or 4 hepatitis C virus infection and advanced liver disease: a multicenter, open-label, randomised, phase 2 trial. Lancet Infect Dis 2016;16(6):685-97.
Manns M, Samuel D, Gane EJ, Mutimer D, McCaughan G, Buti M and SOLAR-2 investigators. Ledipasvir and sofosbuvir plus ribavirin in patients with genotype 1 or 4 hepatitis C infection and advanced liver disease: a multicenter, open label, randomized, phase 2 trial. Lancet Infect Dis 2016; 16(6):685-697.
Marroni CA. Management of alcohol recurrence before and after liver transplantation. Clin Res Hepatol Gastroenterol 2015 Sep;39 Suppl 1:S109-14.
Martin AP, Bartels M, Redlich J, Hauss J, Fangmann J. A single center experience with liver transplantation for Wilson’s disease. Clin Transplant 2008;22:216-21.
Massie AB, Caffo B, Gentry SE, Hall EC. MELD exceptions and rates of waiting list outcomes. Am J Transplant 2011;11:2362-71.
Masuoka HC, Rosen CB. Transplantation for cholangiocarcinoma. Clin Liver Dis 2011;15:699-715.
Mathurin P, Moreno C, Samuel D, et al. Early liver transplantation for severe alcoholic hepatitis. N Engl J Med 2011;365(19):1790-1800.
Mazzaferro V, Sposito C, Zhou J, et al. Metroticket 2.0 model for analysis of competing risks of death after liver transplantation for hepatocellular carcinoma. Gastroenterology 2018;154(1):128-39.
McPherson S, Elsharkawy AM, Ankcorn M, Ijaz S, Powell J, Rowe I, Tedder R, Andrews PA8. Summary of the British Transplantation Society UK Guidelines for Hepatitis E and Solid Organ Transplantation. Transplantation 2018; 102(1):15-20.
Meeks AC, Madill J. Sarcopenia in liver transplantation: A review. Clin Nutr ESPEN 2017;22:76-80.Memon K, Lewandowski RJ, Riaz A, Salem R. Yttrium 90 microspheres for the treatment of hepatocellular carcinoma. Recent Results Cancer Res 2013;190:207-24.
Mendes F, Couto CA, Levy C. Recurrent and de novo autoimmune liver diseases. Clin Liver Dis. 2011;15:859-78.
Merion RM, Schaubel DE, Dykstra DM, et al. The survival benefit of liver transplantation. Am J Transplant 2005;5:307-13.
Merli M, Giannelli V, Gentili F, et al. Ribavirin priming improves the virological response to antiviral treatment in transplanted patients with recurrent hepatitis C: a pilot study. Antivir Ther 2011;16:879-85.
Modified Guidelines of the German Medical Association for organ transplantation 2012 available in: Richtlinien der Bundesärztekammer zur Organtransplantation gemäß §16 Abs.1 S.1 Nrn. 2 und 5 TPG. Deutsches Ärzteblatt 2012;109 (Heft 1-2):A60 (51).
Moini M, Mistry P, Schilsky ML. Liver transplantation for inherited metabolic disorders of the liver. Curr Opin Organ Transplant 2010;15:269-76.
Molmenti EP, Netto GJ, Murray NG, et al. Incidence and recurrence of autoimmune/alloimmune hepatitis in liver transplant recipients. Liver Transpl 2002;8:519-26.
Montano-Loza AJ, Wasilenko S, Bintner J, Mason AL. Cyclosporine A protects against primary biliary cirrhosis recurrence after liver transplantation. Am J Transplant 2010;10:852-8.
Montano-Loza AJ, Bhanji RA, Wasilenko S, Mason AL. Systematic review: recurrent autoimmune liver diseases after liver transplantation. Aliment Pharmacol Ther 2016;45:4:485-500
Moreira Kulak CA, Cochenski B, Borba VZ, Kulak J, et al. Posttransplantation osteoporosis. Arq Bras Endocrinol Metab 2010;54:143-9.
Moreno Planas JM, Cuervas-Mons Martinez V, Rubio Gonzalez E, et al. Mycophenolate mofetil can be used as monotherapy late after liver transplantation. Am J Transplant 2004;4:1650-5.
Morioka D (a), Egawa H, Kasahara M, et al. Impact of human leukocyte antigen mismatching on outcomes of living donor liver transplantation for primary biliary cirrhosis. Liver Transpl 2007;13:80-90.
Morioka D (b), Egawa H, Kasahara M, et al. Outcomes of adult-to-adult living donor liver transplantation. A single institution`s experience with 335 consecutive cases. Ann Surg 2007;245:315-25.
Morris PD, Laurence JM, Yeo D, Crawford M, et al. Can response to locoregional therapy help predict long-term survival after liver transplantation for hepatocellular carcinoma? A systematic review. Liver Transpl. 2016 Dec 22. doi: 10.1002/lt.24689.
Mullen KD, Sanyal AJ, Bass NM, et al. Rifaximin is safe and well tolerated for long-term maintenance of remission from overt hepatic encephalopathy. Clin Gastroenterol Hepatol 2014;12(8):1390-7.
Mumtaz K, Faisal N, Husain S, et al. Universal prophylaxis or preemptive strategy for cytomegalovirus disease after liver transplantation: A systematic review and meta-analysis. Am J Transplant 2015;15(2):472-81. Naoumov NV, Lopes AR, Burra P, et al. Randomized trial of lamivudine versus hepatitis B immunoglobulin for long-term prophylaxis of hepatitis B recurrence after liver transplantation. J Hepatol 2001;34:888-94.
Nadalin S, Capobianco I, Königsrainer I, Harder B, Königsrainer A. Living liver donor: indications and technical aspects. Chirurg. 2015;86(6):609-21.
Nath DS, Kalis A, Nelson S, Payne WD, Lake JR, Humar A. Hepatitis B prophylaxis post-liver transplant without maintenance hepatitis B immunoglobulin therapy. Clin Transplant 2006;20:206-10.
Nel JD, Epstein S. Metabolic Bone Disease in the Posttransplant Population: Preventative and Therapeutic Measures. Med Clin North Am 2016;100(3):569-86.
Nelson DR, Cooper JN, Lalezari JP,; ALLY-3 Study Team. All-oral 12-week treatment with daclatasvir plus sofosbuvir in patients with hepatitis C virus genotype 3 infection: ALLY-3 phase III study. Hepatology 2015;61(4):1127-35.
Neuberger J. Incidence, timing, and risk factors for acute and chronic rejection. Liver Transpl Surg 1999;5:S30-6.
Notarpaolo A, Layese R, Magistri P, et al. Validation of the AFP model as a predictor of HCC recurrence in patients with viral hepatitis-related cirrhosis who had received a liver transplant for HCC. J Hepatol 2017;66(3):552-559.
Okumura K, Yamashita T, Masuda T, et al. Long-term outcome of patients with hereditary transthyretin V30M amyloidosis with polyneuropathy after liver transplantation.Amyloid. 2016;23(1):39-45.
Pabón V, Dumortier J, Gincul R, et al. Long-term results of liver transplantation for Wilson’s disease. Gastroenterol Clin Biol 2008;32:378-81.
Pascher A, Sauer IM, Walter M, et al. Donor evaluation, donor risks, donor outcome, and donor quality of life in adult-to-adult living donor liver transplantation. Liver Transpl 2002;8:829-37.
Pascher A, Neuhaus P. Bile duct complications after liver transplantation. Transpl Int 2005;18:627-42.
Pascual J, Royuela A, Fernández AM. Role of mTOR inhibitors for the control of viral infection in solid organ transplant recipients.Transpl Infect Dis 2016;18(6):819-831.
Patel S, Orlaoff M, Tsoulfas G, et al. Living donor liver transplantation in the United States: identifying donors at risk for perioperative complications. Am J Transplant 2007;7:2344-9.
Paya C, Humar A, Dominguez E, et al. Efficacy and safety of valganciclovir vs. oral ganciclovir for prevention of cytomegalovirus disease in solid organ transplant recipients. Am J Transplant 2004;4:611-20.
Perkins JD. Biliary tract complications: The most common postoperative complication in living liver donors. Liver Transpl 2008:14:1372-7.
Perney P, Bismuth M, Sigaud H, et al. Are preoperative patterns of alcohol consumption predictive of relapse after liver transplantation for alcoholic liver disease? Transpl Int 2005;18:1292-7.
Pereira P, Peixoto A. Biliary Complications - The “achilles heel” of orthotopic liver transplantation. J Gastroenterol 2018;25(1):1–3.
Perricone G, Duvoux C, Berenguer M, et al. Delisting HCV-infected liver transplant candidates who improved after viral eradication: Outcome 2 years after delisting. Liver Int 2018; doi: 10.1111/liv.13878. [Epub ahead of print].
Phan TL, Lautenschlager I, Razonable RR, Munoz FM. HHV-6 in liver transplantation: A literature review. Liver Int 2018;38(2):210-23.
Pfitzmann R, Schwenzer J, Rayes N, Seehofer D, Neuhaus R, Nüssler NC. Long-term survival and predictors of relapse after orthotopic liver transplantation for alcoholic liver disease. Liver Transpl 2007;13:197-205.
Picciotto FP, Tritto G, Lanza AG, et al. Sustained virological response to antiviral therapy reduces mortality in HCV reinfection after liver transplantation. J Hepatol 2007:46:459-65.
Pischke S, Suneetha PV, Baechlein C, et al. Hepatitis E virus infection as a cause of graft hepatitis in liver transplant recipients. Liver Transpl 2010;16(1):74-82.
Pomfret EA, Washburn K, Wald C et al. Report of a national conference on liver allocation in patients with hepatocellular carcinoma in the United States. Liver Transpl. 2010;16:262-78.
Poordad F, Hezode C, Trinh R, Kowdley KV, Zeuzem S, Agarwal K, Shiffman ML, Wedemeyer H, Berg T, Yoshida EM, Forns X, Lovell SS, Da Silva-Tillmann B, Collins CA, Campbell AL, Podsadecki T, Bernstein B. ABT-450/r-ombitasvir and dasabuvir with ribavirin for hepatitis C with cirrhosis. N Engl J Med 2014;370(21):1973-82.
Poordad F, Schiff ER, Vierling JM. Daclatasvir with sofosbuvir and ribavirin for hepatitis C virus infection with advanced cirrhosis or post-liver transplantation recurrence. Hepatology 2016;63(5):1493-505. Prados E, Cuervas-Mons V, de la Mata M, et al. Outcome of autoimmune hepatitis after liver transplantation. Transplantation 1998;66:1645-50.
Protzer U, Böhm F, Longerich T, et al. Molecular detection of hepatitis E virus (HEV) in liver biopsies after liver transplantation. Mod Pathol 2015;28(4):523-32.
Pulitano C, Ho P, Verran D, et al. Molecular profiling of post-reperfusion milieu determines acute kidney injury after liver transplantation: a prospective study. Liver Transpl 2018; 23. doi: 10.1002/lt.25178. [Epub ahead of print].
Qi HL, Zhuang BJ, Li CS, Liu QY. Peri-operative use of sorafenib in liver transplantation: a time-to-event meta-analysis. World J Gastroenterol 2015;21(5):1636-40.
Qin YS, Li ZS, Sun ZX, Wu RP, Wang N, Yao YZ. Endoscopic management of biliary complications after orthotopic liver transplantation. Hepatobiliary Pancreat Dis Int 2006;5:39-42.
Qiu J, Ozawa M, Terasaki PI. Liver transplantation in the United States. Clin Transpl 2005:17-28.
Quillin RC 3rd, Guarrera JV. Hypothermic machine perfusion in liver transplantation. Liver Transpl 2018;24(2):276-81. doi: 10.1002/lt.25004.Quintini C, Hashimoto K, Uso TD, Miller C. Is there an advantage of living over deceased donation in liver transplantation? Transpl Int 2013;26:11-9.
Radunz S, Juntermanns B, Kaiser GM et al. Efficacy and safety of linezolid in liver transplant patients. Transpl Infect Dis 2011;13:353-8.
Raimondo ML, Dagher L, Papatheodoridis GV, et al. Long-term mycophenolate mofetil monotherapy in combination with calcineurin inhibitors for chronic renal dysfunction after liver transplantation. Transplantation 2003;75:186-90.
Razonable RR, Zerr DM and the AST Infectious Diseases Community of Practice. HHV-6, HHV-7 and HHV-8 in Solid Organ Transplant Recipients. Am J Transplant 2009;9 S97-S103.
Reddy KR, Lim JK, Kuo A, Di Bisceglie AM,et al ; HCV-TARGET Study Group. All-oral direct-acting antiviral therapy in HCV-advanced liver disease is effective in real-world practice: observations through HCV-TARGET database. All-oral direct-acting antiviral therapy in HCV-advanced liver disease is effective in real-world practice: observations through HCV-TARGET database. Aliment Pharmacol Ther 2017;45(1):115-26.
Reau N, Kwo PY, Rhee S, et al. Glecaprevir/Pibrentasvir treatment in liver or kidney transplant patients with hepatitis C virus infection. Hepatology 2018. doi: 10.1002/hep.30046. [Epub ahead of print].
Reddy KR, Bourlière M, Sulkowski M, et al. Ledipasvir and sofosbuvir in patients with genotype 1 hepatitis C virus infection and compensated cirrhosis: An integrated safety and efficacy analysis. Hepatology 2015;62(1):79-86.
Reig M, Mariño Z, Perelló C, et al. Unexpected high rate of early tumour recurrence in patients with HCV-related HCC undergoing interferon-free therapy.J Hepatol 2016;65(4):719-26.
Ringe B, Wittekind C, Bechstein WO, et al. The role of liver transplantation in hepatobiliary malignancy. A retrospective analysis of 95 patients with particular regard to tumour stage and recurrence. Ann Surg 1989;209:88-98.
Roayie K, Feng S. Allocation policy for hepatocellular carcinoma in the MELD era: room for improvement? Liver Transpl 2007;13:S36-43.
Ridruejo E, Silva MO. Safety of long-term nucleos(t)ide treatment in chronic hepatitis B. Expert Opin Drug Saf 2012; 11: 357-60.
Rocha A, Lobato L. Liver transplantation in transthyretin amyloidosis: Characteristics and management related to kidney disease. Transplant Rev (Orlando) 2016; 31(2):115-120.Rodriguez-Torres M. Sofosbuvir (GS-7977), a pan-genotype, direct-acting antiviral for hepatitis C virus infection. Expert Rev Anti Infect Ther 2013;11(12):1269-79.
Rodríguez-Castro KI, De Martin E, Gambato M, Lazzaro S, Villa E, Burra P. Female gender in the setting of liver transplantation. World J Transplant 2014;4(4):229-42.
Roth D, Nelson DR, Bruchfeld A, et al. Grazoprevir plus elbasvir in treatment-naive and treatment-experienced patients with hepatitis C virus genotype 1 infection and stage 4-5 chronic kidney disease (the C-SURFER study): a combination phase 3 study. Lancet 2015;386(10003):1537-45.
Rudraraju M, Osowo AT, Singh V, Carey EJ. Do patients need more frequent colonoscopic surveillance after liver transplantation? Transplant Proc 2008;40:1522-4.
Saab S, Desai S, Tsaoi D, et al. Posttransplantation hepatitis B prophylaxis with combination oral nucleoside and nucleotide analogue therapy. Am J Transplant 2011;11:511-7.
Saliba F (a), Dharancy S, Lorho R, et al. Conversion to everolimus in maintenance liver transplant patients: a multicenter, retrospective analysis. Liver Transpl 2011;17:905-13.
Saliba F (b), De Simone P, Nevens F et al. Efficacy and safety of everolimus with early reduction or elimination of tacrolimus in 719 de novo liver transplant recipients: 12 month results of a randomized, controlled study. Am J Transplant 2012;12(11):3008-20.
Sanchez EQ, Martin AP, Ikegami T, et al. Sirolimus conversion after liver transplantation: improvement in measured glomerular filtration rate after 2 years. Transplant Proc 2005;37:4416-23.
Saner FH, Cicinnati VR, Sotiropoulos G, Beckebaum S. Strategies to prevent or reduce acute and chronic kidney injury in liver transplantation. Liver Int 2012;32(2):179-88.
Satapathy SK, Joglekar K, Molnar MZ, et al. Achieving sustained virologic response in liver transplant recipients with hepatitis C decreases risk of decline in renal function. Liver Transpl 2018; doi: 10.1002/lt.25059. [Epub ahead of print].
Schiff E, Lai CL, Hadziyannis S, et al. Adefovir dipivoxil for wait-listed and post-liver transplantation patients with lamivudine-resistant hepatitis B: final long-term results. Liver Transpl 2007;13:349-60.
Schlitt HJ, Loss M, Scherer M, et al. Current developments in liver transplantation in Germany: MELD-based organ allocation and incentives for transplant centres. Z Gastroenterol 2011;49:30-8.
Schmeding M, Kiessling A, Neuhaus R et al. Mycophenolate mofetil monotherapy in liver transplantation: 5-year follow-up of a prospective randomized trial. Transplantation 2011;92:923-9.
Schnitzbauer AA, Sothmann J, Baier L, Bein T, Geissler EK, Scherer MN, Schlitt HJ. Calcineurin inhibitor free de novo immunosuppression in liver transplant recipients with pretransplant renal impairment: Results of a pilot study (PATRON07). Transplantation 2015;99(12):2565-75.
Schreiber PW, Bischoff-Ferrari HA, Boggian K, et al. Bone metabolism dynamics in the early posttransplant period following kidney and liver transplantation. PLoS One 2018;13(1):e0191167. doi: 10.1371/journal.pone.0191167. eCollection 2018.
Shah JN, Haigh WG, Lee SP, Lucey MR, Brensinger CM, Kochman ML, Long WB, Olthoff K, Shaked A, Ginsberg GG. Biliary casts after orthotopic liver transplantation: clinical factors, treatment, biochemical analysis. Am J Gastroenterol 2003;98:1861–1867.
Sharma P, Schaubel DE, Messersmith EE, Guidinger MK, Merion RM. Factors that affect deceased donor liver transplantation rates in the United States in addition to the model for end-stage liver disease score. Liver Transpl. 2012;18:1456-63.
Shiraz AR, Nayeem MA, Agarwal S, Goyal N, Gupta S. Vascular complications in living donor liver transplantation at a high volume centre: Evolving protocols and trends observed over 10 years. Liver Transpl 2016; 23(4):457-64.
Shuster A, Huynh TJ, Rajan DK, Marquez MA, Grant DR, Huynh DC, Jaskolka JD. Response Evaluation Criteria in Solid Tumours (RECIST) criteria are superior to European Association for Study of the Liver (EASL) criteria at 1 month follow-up for predicting long-term survival in patients treated with transarterial chemoembolization before liver transplantation for hepatocellular cancer.J Vasc Interv Radiol 2013;24(6):805-12.
Silva MF, Sherman M. Criteria for liver transplantation for HCC: What should the limits be? J Hepatol 2011;55:1137-47.
Silveira MG, Talwalkar JA, Lindor KD, Wiesner RH. Recurrent primary biliary cirrhosis after liver transplantation. Am J Transplant 2010;10:720-6.
Singh S, Watt KD. Long-term Medical Management of the Liver Transplant Recipient: What the Primary Care Physician Needs to Know. Mayo Clin Proc 2012; 87(8): 779–790.
Smets F, Sokal EM. Epstein-Barr virus-related lymphoproliferation in children after liver transplant: role of immunity, diagnosis, and management. Pediatr Transplant 2002;6:280-7.
Soliman T, Hetz H, Burghuber C. Short-term induction therapy with anti-thymocyte globulin and delayed use of calcineurin inhibitors in orthotopic liver transplantation. Liver Transpl 2007;13:1039-44.
Sotiropoulos GC, Malago M, Molmenti E, et al. Liver transplantation for hepatocellular carcinoma in cirrhosis: is clinical tumour classification before transplantation realistic? Transplantation 2005;79:483-7.
Sotiropoulos GC, Molmanti EP, Lösch C, Beckebaum S, Brolesch CE, Lang H. Meta-analysis of tumour recurrence after liver transplantation for hepatocellular carcinoma based on 1,198 cases. Eur J Med Res 2007;12:527-34.
Sotiropoulos CG (a), Beckebaum S, Lang H, et al. Single-center experience on liver transplantation for hepatocellular carcinoma arising in alcoholic cirrhosis: results and ethical issues. Eur Surg Res 2008;40:7-13.
Sotiropoulos GC (b), Lang H, Sgourakis G, et al. Liberal policy in living donor liver transplantation for hepatocellular carcinoma: Lessons learned. Dig Dis Sci 2009;54(2):377-84.
Sotiropoulos GC, Molmenti EP, Lang H. Milan criteria, up-to-seven criteria, and the illusion of a rescue package for patients with liver cancer. Lancet Oncol 2009;10:207-8.
Staufer K, Andresen H, Vettorazzi E, et al. Urinary ethyl glucuronide as a novel screening tool in patients pre and post liver transplantation improves detection of alcohol consumption. Hepatology 2011;54(5):1640-9.
Sterneck M, Kaiser GM, Heyne N, et al. Everolimus and early calcineurin inhibitor withdrawal: 3-year results from a randomized trial in liver transplantation. Am J Transplant 2014;14(3):701-10.
Strassburg CP et al. Practice guideline autoimmune liver diseases - AWMF-Reg. No. 021-27]. Z Gastroenterol 2017;55:1135-1226.
Sugawara Y, Makuuchi M. Technical advances in living-related liver transplantation. J Hepatobiliary Pancreat Surg 1999;6:245-53.
Sugawara Y, Makuuchi M. Living donor liver transplantation: present status and recent advances. Br Med Bull 2005;75-76:15-28.
Suhling H, Gottlieb J, Bara C, et al. Chronic rejection: Differences and similarities in various solid organ transplants. Internist (Berl) 2016;57(1):25-37.
Sutcliffe RP, Maguire DD, Muiesan P, et al. Liver transplantation for Wilson’s disease: long-term results and quality-of-life assessment. Transplantation 2003;75:1003-6.
Sylvestre PB, Batts KP, Burgart LJ, Poterucha JJ, Wiesner RH. Recurrence of primary biliary cirrhosis after liver transplantation: Histologic estimate of incidence and natural history. Liver Transpl 2003;9:1086-93.
Tamura S, Sugawara Y, Kaneko J, Matsui Y, Togashi J, Makuuchi M. Recurrence of primary sclerosing cholangitis after living donor liver transplantation. Liver Int 2007;27:86–94.
Teefey SA, Hildeboldt CC, Dehdashti F, et al. Detection of primary hepatic malignancy in liver transplant candidates: prospective comparison of CT, MR imaging, US, and PET. Radiology 2003;226:533-42.
Teperman LW, Poordad F, Bzowej N, et al. Randomized trial of emtricitabine/tenofovir disoproxil fumarate after hepatitis B immunoglobulin withdrawal after liver transplantation. Liver Transpl 2013;19(6):594-601.
Thimonier E, Guillaud O, Walter T, et al. Conversion to everolimus dramatically improves the prognosis of de novo malignancies after liver transplantation for alcoholic liver disease. Clin Transplant 2014;28(12):1339-48.
Trunecka P, Klempnauer J, Bechstein WO, Pirenne J, Friman S, Zhao A, Isoniemi H, Rostaing L, Settmacher U, Mönch C, Brown M, Undre N, Tisone G; DIAMOND study group. Renal function in de novo liver transplant recipients receiving different prolonged-release tacrolimus regimens-the DIAMOND Study. Am J Transplant 2015;15(7):1843-54.
Stravitz TR, Shiffman ML, Kimmel M, et al. Substitution of tenofovir/emtricitabine for hepatitis B immune globulin prevents recurrence of Hepatitis B after liver transplantation. Liver Int 2012;32(7):1138-45.
Terrault NA, Lok ASF, McMahon BJ, et al. Update on prevention, diagnosis, and treatment of chronic hepatitis B: AASLD 2018 Hepatitis B Guidance. Hepatology 2018;67(4),1560-99.
Tokunaga S, Koda M, Matono T, et al. Assessment of ablative margin by MRI with ferucarbotran in radiofrequency ablation for liver cancer: comparison with enhanced CT. Br J Radiol 2012;85:745-52.
Toniutto P, Fabris C, Fumo E, et al. Pegylated versus standard interferon-alpha in antiviral regimens for posttransplant recurrent hepatitis C: comparison of tolerability and efficacy. J Gastroenterol Hepatol 2005;20:577-82.
Toso C, Meeberg GA, Bigam DL, et al. De novo sirolimus-based immunosuppression after liver transplantation for hepatocellular carcinoma: long-term outcomes and side effects. Transplantation 2007;83:1162-8.
Toso C, Mentha G, Kneteman NM, Majno P. The place of downstaging for hepatocellular carcinoma. J Hepatol 2010;52:930-6.
Tournoux-Facon C, Paoletti X, Barbare JC, et al. Development and validation of a new prognostic score of death for patients with hepatocellular carcinoma in palliative setting. J Hepatol 2011;54:108-14.
Tripathi D, Neuberger J. Autoimmune hepatitis and liver transplantation: indications, results, and management of recurrent disease. Semin Liver Dis 2009;29:286-96.
Tung BY, Kimmey MB. Biliary complications of orthotopic liver transplantation. Dig Dis 1999;17:133-44.
Ulrich C, Degen A, Patel MJ, Stockfleth. Sunscreens in organ transplant patients. Nephrol Dial Transplant 2008;23:1805-8.
Vagefi PA, Ascher NL, Freise CE, Dodge JL, Roberts JP. The use of living donor liver transplantation varies with the availability of deceased donor liver transplantation. Liver Transpl 2012;18(2):160-5 .
Valentin-Gamazo C, Malago M, Karliova M, et al. Experience after the evaluation of 700 potential donors for living donor liver transplantation in a single center. Liver Transpl 2004; 10: 1087-96.
Vallejo GH, Romero CJ, de Vicente JC. Incidence and risk factors for cancer after liver transplantation.Crit Rev Oncol Hematol 2005;56:87-99.
van Vugt JLA, Alferink LJM, Buettner S, et al. A model including sarcopenia surpasses the MELD score in predicting waiting list mortality in cirrhotic liver transplant candidates: a competing risk analysis in a national cohort. J Hepatol 2017;pii: S0168-8278(17)32474-1. doi: 10.1016/j.jhep.2017.11.030.
Vera A, Moledina S, Gunson B, et al. Risk factors for recurrence of primary sclerosing cholangitis of liver allograft. Lancet 2002;360:1943-4.
Verdonk RC, Buis CI, van der Jagt EJ, et al. Nonanastomotic biliary strictures after liver transplantation, part 2: Management, outcome, and risk factors for disease progression. Liver Transpl 2007;13:725-32.
Vitale A, Bertacco A, Gambato M et al. Model for end-stage liver disease-sodium and survival benefit in liver transplantation. Transpl Int 2012;3.26(2):138-44.
Vogel A, Heinrich E, Bahr MJ, et al. Long-term outcome of liver transplantation for autoimmune hepatitis. Clin Transplant 2004;18:62-9.
Washington K. Update on post-liver transplantation infections, malignancies, and surgical complications. Adv Anat Pathol 2005;12:221-6.
Weber NK, Forman LM, Trotter JF. HBIg discontinuation with maintenance oral anti-viral herapy and HBV vaccination in liver transplant recipients. Dig Dis Sci 2010;55:505-9.
Weiss KH, Gotthardt D, Schmidt J, et al. Liver transplantation for metabolic liver diseases in adults: indications and outcome. Nephrol Dial Transplant 2007;22, Suppl 8:viii9-12.
Weismüller TJ, Prokein J, Becker T, et al. Prediction of survival after liver transplantation by pretransplant parameters. Scand J Gastroenterol 2008;43:736-46.
Welling TH, Feng M, Wan S, et al. Neoadjuvant stereotactic body radiation therapy, capecitabine, and liver transplantation for unresectable hilar cholangiocarcinoma. Liver Transpl 2014;20(1):81-8.
Welzel TM, Reddy KR, Flamm SL et al. On-treatment HCV RNA in patients with varying degrees of fibrosis and cirrhosis in the SOLAR-1 trial. Antivir Ther. 2016;21(6):541-546.
Wesdorp DJ, Knoester M, Coenraad MJ, et al. One-year results of tenofovir and emtricitabine without immunoglobulin to prevent hepatitis b recurrence after liver transplantation. J Hepatol 2012; 56 (Suppl. 2):S96-S97.
Wibaux C, Legroux-Gerot I, Dharancy S, et al. Assessing bone status in patients awaiting liver transplantation. Joint Bone Spine 2011; 78:387-91.
Wigg AJ, Gunson BK, Mutimer DJ. Outcomes following liver transplantation for seronegative acute liver failure: experience during a 12-year period with more than 100 patients. Liver Transpl 2005;11:27-34.
Wong PY, Portmann B, O’Grady JG, et al. Recurrence of primary biliary cirrhosis after liver transplantation following FK506-based immunosuppression. J Hepatol 1993;17:284-7.
Wong RJ, Aguilar M, Cheung R, Perumpail RB, Harrison SA, Younossi ZM, Ahmed A. Nonalcoholic steatohepatitis is the second leading aetiology of liver disease among adults awaiting liver transplantation in the United States. Gastroenterology 2015;148(3):547-55.
Yahyazadeh A, Beckebaum S, Cicinnati V, et al. Efficacy and safety of subcutaneous human HBV-immunoglobulin (Zutectra) in liver transplantation: an open, prospective, single-arm phase III study. Transpl Int 2011;24:441-50.
Yang Y, Zhao JC, Yan LN, et al. Risk factors associated with early and late HAT after adult liver transplantation. World J Gastroenterol. 2014;20(30):10545-52.
Yao FY, Xiao L, Bass NM, Kerlan R, Ascher NL, Roberts JP. Liver transplantation for hepatocellular carcinoma: validation of the UCSF-expanded criteria based on preoperative imaging. Am J Transpl 2007;7:2587-96.
Yoo MC, Vanatta JM, Modanlou KA, et al. Steroid-free liver transplantation using rabbit antithymocyte globulin induction in 500 consecutive patients. Transplantation 2015;99(6):1231-5.
Yoshida H, Kato T, Levi DM, et al. Lamivudine monoprophylaxis for liver transplant recipients with non-replicating hepatitis B virus infection. Clin Transplant 2007;21:166-71.
Yoshida EM, Marotta PJ, Greig PD, et al. Evaluation of renal function in liver transplant recipients receiving daclizumab (Zenapax), mycophenolate mofetil, and a delayed, low-dose tacrolimus regimen vs. a standard-dose tacrolimus and mycophenolate mofetil regimen: a multicenter randomized clinical trial. Liver Transpl 2005;11:1064-72.
Younossi ZM, Blissett D, Blissett R, et al. The economic and clinical burden of nonalcoholic fatty liver disease in the United States and Europe.Hepatology. 2016 Nov;64(5):1577-86.
Yu L, Ioannou GN. Survival of liver transplant recipients with haemochromatosis in the United States. Gastroenterology 2007;133:489-95.
Zaffar N, Soete E, Gandhi S, Sayyar P, Van Mieghem T,2, D'Souza R. Pregnancy outcomes following single and repeat liver transplantation: An international two-centre cohort. Liver Transpl 2018. doi: 10.1002/lt.25071. [Epub ahead of print].
Zavaglia C, De Carlis L, Alberti AB, et al. Predictors of long term survival after liver transplantation for hepatocellular carcinoma. Am J Gastroenterol 2005;100:2708-16.
Zimmerman MA, Trotter JF, Wachs M, et al. Sirolimus-based immunosuppression following liver transplantation for hepatocellular carcinoma. Liver Transpl 2008;14:633-8.
Zimmermann T, Beckebaum S, Berg C, et al. Expert recommendations: Hepatitis C and transplantation]. Z Gastroenterol. 2016 Jul;54(7):665-84.
Zoepf T, Maldonado-Lopez EJ, Hilgard P, et al. Balloon dilatation vs. balloon dilatation plus bile duct endoprostheses for treatment of anastomotic biliary strictures after liver transplantation. Liver Transpl 2006;12:88-94.
Zoepf T, Maldonado de Dechêne EJ, Dechêne A, et al. Optimized endoscopic treatment of ischemic-type biliary lesions after liver transplantation. Gastrointest Endosc 2012;76:556-63.
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