Post-transplant biliary complications: an analysis from a predominantly living donor liver transplant center

Post-living donor liver transplant biliary strictures: prevalence, predictors, and long-term outcomes in a retrospective study

Background

Post-liver transplant biliary strictures are a common cause of morbidity among patients who have undergone living donor liver transplantation (LDLT). Limited data are available concerning the response rates to various treatment modalities and the long-term outcomes for these individuals.

Methods

This study was a retrospective analysis of a prospectively collected database, including adult patients aged 18 years or older who underwent LDLT between 2006 and 2022.

Results

Between 2006 and 2022, a total of 3,550 patients underwent liver transplantation. After applying exclusion criteria, 2,956 patients were included in the analysis. During the study period, 344 patients (11.6%) developed biliary strictures. Of these, 77.0% underwent endoscopic retrograde cholangiopancreatography as the primary treatment for biliary strictures, while the remainder received percutaneous transhepatic biliary drainage. Identified risk factors for post-liver transplant biliary strictures included the presence of multiple biliary anastomoses, bile leak, and older donor and recipient ages. The overall graft and patient survival rates were comparable between patients with and without biliary strictures, at both 1 year (93.0% vs. 96.3%) and 5 years (82.3% vs. 79.2%).

Conclusions

Biliary strictures are observed in approximately 11% of recipients following LDLT. While the presence of biliary strictures is associated with increased morbidity, it does not significantly impact patient survival.

Ultrasound innovations in abdominal radiology: multiparametic imaging in liver transplantation

PURPOSE

Ultrasound plays a central role in liver transplant evaluation. Acute, subacute, and chronic complications can be readily identified using grayscale and color Doppler ultrasound. Contrast-enhanced ultrasound adds a new dimension to liver transplant evaluation, depicting vascular and parenchymal processes with exquisite detail. In addition, emerging evidence suggests that contrast-enhanced ultrasound may allow for localization of biliary leak in select patients. We aimed to assess the use of multiparametric ultrasound-including grayscale, color and spectral Doppler, and contrast-enhanced ultrasound-in the setting of liver transplantation.

METHODS

A literature review was performed using the MEDLINE bibliographic database through the National Library of Medicine. The following terms were searched and relevant citations assessed: "abdominal ultrasound," "contrast-enhanced ultrasound," "liver transplant," and "ultrasound."

RESULTS

Grayscale and color Doppler ultrasound represent the mainstay imaging modalities for postoperative liver transplant evaluation. The addition of contrast enhancement plays a complementary role and can provide valuable information related to the allograft vasculature, parenchyma, and biliary tree. The appropriate implementation of grayscale, color Doppler, and contrast-enhanced ultrasound can optimize sensitivity, specificity, and accuracy for the detection of liver transplantation complications, including hepatic artery stenosis, biliary leakage, and infection.

CONCLUSION

Multimodal sonographic evaluation is essential to identify postoperative complications in liver transplant recipients. Contrast-enhanced ultrasound may be of value in challenging cases, providing excellent anatomic delineation and reducing the risk of false-positive and false-negative diagnoses. A broad familiarity with appropriate applications of both nonenhanced and contrast-enhanced ultrasound may help radiologists optimize allograft assessment and improve patient outcomes.

Does T-tube indwelling prolong the procedure of endoscopic retrograde cholangiopancreatography for healing duct-to-duct anastomotic bile leakage after liver transplantation?

Endoscopic retrograde cholangiopancreatography (ERCP) is the preferred treatment for duct-to-duct anastomotic bile leakage (D-D aBL) after liver transplantation (LT). This study aimed to compare the time required for ERCP and D-D aBL recovery in post-LT patients with and without T-tube drainage. A total of 40 patients (11 with T-tube drainage and 29 without T-tube drainage) with confirmed D-D aBLs treated successfully with ERCP from July 2016 to September 2021 were reviewed. The mean interval from LT to initial ERCP was significantly longer in patients with T-tube drainage than in those without T-tube drainage (41.9 vs 25.1 days, P < .05). However, there was no significant difference in the time required for ERCP to result in D-D aBL healing between patients with T-tube drainage and those without T-tubes (33.4 vs 23.0 days). T-tube indwelling did not significantly prolong the course required for ERCP to resolve D-D aBL in post-LT patients.

Recipient-associated risk factors for post-liver transplantation biliary complications: A cohort study

INTRODUCTION

Biliary complications (BCs) are a well-documented post-liver transplantation concern with potential implications for patient survival. This study aims at identifying risk factors associated with the development of BCs in recipients after liver transplantation (LT) and exploring strategies for their management.

METHODS

We conducted a retrospective analysis of 1595 adult patients (age > 18 years) who underwent LT surgery between 2019 and 2021. The study assessed the incidence of BCs in this cohort.

RESULTS

Of 1595 patients, 178 (11.1%) experienced BCs, while 1417 (88.8%) did not exhibit any signs of such complications. Patients who developed BCs were found to have a significantly lower average age (p < 0.001) and longer cold ischemic times (p < 0.001) compared to those without BCs. Variables such as sex, body mass index (BMI), model for end-stage liver disease (MELD) score, primary diagnosis, type of anastomosis, hepatectomy technique, type of transplanted liver and mortality did not demonstrate statistically significant differences between the two groups (p > 0.05). Univariate logistic regression analysis revealed that a cold ischemic time exceeding 12 hours and duct-to-duct anastomosis were positive predictors for BC development (odds ratios of 6.23 [CI 4.29-9.02] and 1.47 [CI 0.94-2.30], respectively). Conversely, increasing age was associated with a protective effect against BC development, with an odds ratio of 0.64 (CI 0.46-0.89).

CONCLUSION

Our multi-variate analysis identified cold ischemia time (CIT) as the sole significant predictor of post-liver transplantation biliary complications. Additionally, this study observed that advancing patient age had a protective influence in this context. Notably, no significant disparities were detected between hepatectomy techniques and the etiology of liver disease types in the two study groups.

Biliary complications after adult-to-adult living-donor liver transplantation: An international multicenter study of 3633 cases

In living-donor liver transplantation, biliary complications including bile leaks and biliary anastomotic strictures remain significant challenges, with incidences varying across different centers. This multicentric retrospective study (2016-2020) included 3633 adult patients from 18 centers and aimed to identify risk factors for these biliary complications and their impact on patient survival. Incidences of bile leaks and biliary strictures were 11.4% and 20.6%, respectively. Key risk factors for bile leaks included multiple bile duct anastomoses (odds ratio, [OR] 1.8), Roux-en-Y hepaticojejunostomy (OR, 1.4), and a history of major abdominal surgery (OR, 1.4). For biliary anastomotic strictures, risk factors were ABO incompatibility (OR, 1.4), blood loss >1 L (OR, 1.4), and previous abdominal surgery (OR, 1.7). Patients experiencing biliary complications had extended hospital stays, increased incidence of major complications, and higher comprehensive complication index scores. The impact on graft survival became evident after accounting for immortal time bias using time-dependent covariate survival analysis. Bile leaks and biliary anastomotic strictures were associated with adjusted hazard ratios of 1.7 and 1.8 for graft survival, respectively. The study underscores the importance of minimizing these risks through careful donor selection and preoperative planning, as biliary complications significantly affect graft survival, despite the availability of effective treatments.

Implementing living-donor pediatric liver transplantation in Southern Vietnam: 15-year results and perspectives

BACKGROUND

ND2 in Ho Chi Minh City is currently the only public center that performs PLT in Southern Vietnam. In 2005, the first PLT was successfully performed, with support from Belgian experts. This study reviews the implementation of PLT at our center and evaluates the results and challenges.

METHODS

Implementation of PLT at ND2 required medico-surgical team building and extensive improvement of hospital facilities. Records of 13 transplant recipients from 2005 to 2020 were studied retrospectively. Short- and long-term complications, as well as the survival rates, were reported.

RESULTS

The mean follow-up time was 8.3 ± 5.7 years. Surgical complications included one case of hepatic artery thrombosis that was successfully repaired, one case of colon perforation resulting in death from sepsis, and two cases of bile leak that were drained surgically. PTLD was observed in five patients, of whom three died. There were no cases of retransplantation. The 1-year, 5-year, and 10-year patient survival rates were 84.6%, 69.2%, and 69.2%, respectively. There were no cases of complication or death among the donors.

CONCLUSION

Living-donor PLT was developed at ND2 for providing a life-saving treatment to children with end-stage liver disease. Early surgical complication rate was low, and the patient survival rate was satisfactory at 1 year. Long-term survival decreased considerably due to PTLD. Future challenges include surgical autonomy and improvement of long-term medical follow-up with a particular emphasis on prevention and management of Epstein-Barr virus-related disease.

Cholangioscopic classification of post-living donor liver transplantation biliary strictures can predict their natural history and response to therapy

BACKGROUND

The study aimed to assess the morphology of post-living donor liver transplant (LDLT) anastomotic biliary strictures using cholangioscopy and assess the impact of morphology on its prognosis.

METHODS

A single centre, prospective, observational study was conducted at a tertiary care teaching hospital from August 2014 to July 2016. Single operator cholangioscopy (SOC) was used to assess post-LDLT anastomotic biliary strictures at presentation in 24 patients. Analysis included demographic and biochemical characteristics, time to stricture development, endoscopic procedural details, time to remodelling and development of recurrence on follow-up.

RESULTS

Two distinct patterns of strictures were identified, type I with minimal inflammatory changes and type II with severe inflammatory changes. Guidewire cannulation was successful in 23 out of 24 (95.8%) patients. There was no significant difference between the two types of strictures based on aetiology of liver disease, CTP and MELD scores, time taken for the development or laboratory parameters at presentation. However, type II strictures required more sessions of dilatation (4 vs. 2; P = 0.002), longer duration for resolution (282.5 vs. 201.5 days, P = 0.095) and more number of stents.

CONCLUSIONS

Addition of cholangioscopy tends to improve stricture cannulation rates at ERCP. It offers a useful classification of post-LDLT strictures with prognostic and therapeutic significance. Type II strictures tend to require more sessions of endotherapy than type I strictures over a longer duration for remodelling.

Risk factors and management of biliary stones after living donor liver transplant and its effect on graft outcome

BACKGROUND

Bile stones are associated with numerous complications in liver transplant recipients. Endoscopic retrograde cholangiopancreatography (ERCP) has been proven to be safe and highly effective in dealing with most post-transplant biliary complications.

OBJECTIVE

The objective of this study was to identify the possible risk factors for bile stone formation on top of biliary stricture, the effects of stones on graft outcomes, and their management.

METHODS

This case-control study included 83 patients who underwent living donor liver transplant (LDLT) and suffered from postoperative biliary stricture with or without stones. Patients were divided into two groups. Group 1 (n = 55) included patients with biliary strictures with no stones and group 2 (n = 28) included patients who developed stones on top of biliary strictures. Data about the recipient and donor characteristics, surgical technique, blood lipid profile, immunosuppressive drugs, post-transplant complications, and interventions were collected from the medical records.

RESULTS

The frequency of hepatitis C virus (HCV) was significantly higher in group 2 compared to group 1 (71.4% vs. 47.3%, p = 0.036). The body mass index (BMI) of the donors was significantly higher in group 2 than in group 1 (25.17 ± 2.53 vs. 23.68 ± 2.63, p = 0.015). Episodes of acute rejection were significantly higher in group 2 than in group 1 (21.4% vs. 5.5%, p = 0.027). The ERCP was sufficient in most of the cases (89.2%) to ensure biliary drainage. The identified independent risk factors for biliary stones included HCV, biliary drain, donor's BMI, and serum cholesterol level.

CONCLUSION

Positive HCV, biliary drain insertion, donor's BMI, and serum cholesterol level were independent risk factors for developing bile stones on top of biliary strictures. Biliary stones were associated with high episodes of acute graft rejection, and they could be successfully managed by the ERCP modality.

Management of Biliary Complications in Liver Transplant Recipients

Biliary complications are often referred to as the Achilles' heel of liver transplantation (LT). The most common of these complications include strictures, and leaks. Prompt diagnosis and management is key for preservation of the transplanted organ. Unfortunately, a number of factors can lead to delays in diagnosis and make adequate treatment a challenge. Innovations in advanced endoscopic techniques have increased non-surgical options for these complications and in many cases is the preferred approach.

Outcomes of Right and Left Hepatic Arterial Anastomosis in Right Lobe Living Donor Liver Transplant

OBJECTIVES

Living donor liver transplant is a complex surgery with well-known complications. Here, we report the use of the right and left hepatic arteries of the recipient for anastomosis and the effects of each procedure on overall outcomes and any associated short-term or long-term biliary complications.

MATERIALS AND METHODS

This was a prospective observational study with long-term follow-up of 200 patients (100 in the right hepatic artery group and 100 in the left hepatic artery group).

RESULTS

The average donor age was 28.9 years in the left hepatic artery group and 30.9 years in the right hepatic artery group. Most of the donors (60%) were female. Overall, there was 10.5% mortality in the early postoperative period. Among survivors, there were more late strictures in the right hepatic artery group (29.7% vs 22.7%). Bile leak (P = .42), mortality (P = .71), and incidence of late-onset biliary strictures (P = .83) were less common in the left hepatic artery group.

CONCLUSIONS

Left artery anastomosis was found to be technically safe and feasible and did not adversely affect patient outcome compared with right artery anastomosis. Left hepatic artery anastomosis may also reduce the incidence of the biliary complications compared with the right hepatic artery anastomosis.

Endoscopic management of high-grade biliary strictures complicating living donor liver transplantation using soehendra stent retrievers

BACKGROUND

Biliary strictures following living donor liver transplantation (LDLT) are usually managed by endoscopic retrograde cholangiography (ERC) with stricture dilation and stent placement. While current endoscopic techniques are successful in most cases, high-grade biliary strictures (HGBS) pose a challenge using currently employed techniques which have a low rate of technical success.

AIMS

In this study, we have explored the safety and efficacy of Soehendra stent retrievers (SSR) for the dilation of HGBS complicating LDLT.

METHODS

This was a prospective cohort study where all patients with anastomotic biliary strictures following LDLT from January 2016 till February 2018 were included. Patients with HGBS defined as the exclusive passage of 0.018-inch guidewire, were included in Group 1. In these patients, 5 Fr Soehendra stent retrievers were used to dilate HGBS over guidewire, using torsional movements. Technical success, safety and clinical response was compared with patients who required Per-cutaneous transhepatic cholangiography (PTC) with rendezvous procedure due to a failed ERC, before the commencement of the study (Group 2).

RESULTS

Ten patients with HGBS were included into Group 1. Technical success defined as successful placement of a biliary stent across the stricture was achieved in all the patients in group 1. Favorable response to endotherapy was higher in group 1(8/10 patients (80%)) as compared to group 2(6/14 patients (42.8%)). There were no post procedure complications in patients of group 1, while 3 patients developed cholangitis in group 2.

CONCLUSIONS

HGBS can be successfully treated with SSR for stricture dilation. It is safe with no significant complications and requires fewer procedures.

Patients with post-transplant biliary strictures have significantly higher rates of liver transplant failure and rejection: A nationwide inpatient analysis

BACKGROUND AND AIM

Biliary strictures are a common complication of liver transplantation. We assess the impact of post-transplant biliary strictures and describe the outcomes of endoscopic retrograde cholangiopancreatography (ERCP), interventional radiology (IR), and surgical therapies.

METHODS

Using the Nationwide Readmissions Database (NRD), hospitalized liver transplant recipients were identified using the International Classification of Diseases 10th Revision codes. Patients with post-transplant biliary strictures were identified, and outcomes (inpatient mortality, 30-day readmission, transplant rejection/infection/failure, and disposition) were compared with transplant recipients without strictures. Among transplant patients with biliary strictures who underwent therapeutic intervention, corresponding outcomes were compared between IR, surgical interventions, and ERCP.

RESULTS

Of the 8300 liver transplant recipients meeting selection criteria, 554 patients (age 48.9 ± 18.2 years, mean ± SD; 39.5% women) had biliary strictures. Compared with patients without strictures, the adjusted odds ratio (OR) for various outcomes in patients with biliary strictures were as follows: 1.46 (1.20, 1.77; P < 0.001) for 30-day non-elective readmission, 2.71 (2.04, 3.59; P < 0.001) allograft rejection, 2.32 (1.61, 3.37; P < 0.001) liver transplant failure, 3.05 (1.39, 6.73; P < 0.01) infection, and 1.41 (1.08, 1.82; P = 0.01) disposition to skilled nursing or intermediate care facility. Therapeutic interventions during index hospitalization were performed in 350 patients: ERCP 46.6% (n = 163), surgery 41% (n = 144), and IR 12.3% (n = 43) patients. Compared with ERCP, the adjusted odds for various outcomes were disposition to skilled nursing or intermediate care facility 2.72 (1.08, 6.87; P = 0.03) and 2.09 (1.05, 4.15; P = 0.036), prolongation of hospitalization 14.4 (3.7, 25.1; P = 0.008) and 15.0 (7.4, 22.7; P < 0.001), and failure of liver allograft 8.47 (1.47, 48.6; P = 0.017) and 12.23 (2.74, 54.4; P = 0.001) for IR and surgical interventions, respectively.

CONCLUSION

Post-liver transplant biliary strictures are associated with increased rates of allograft rejection, allograft failure/infections, and readmissions. Compared with ERCP, management of these patients with IR or surgical interventions is associated with significantly higher rates of allograft failure and hospital stay.

Living Donor Liver Transplant in Patients Aged 60 Years or Older: Experience from a Large Volume Centre in India

BACKGROUND

With ageing population and higher prevalence of nonalcoholic steatohepatitis (NASH) and hepatocellular carcinoma (HCC) in older patients, more and more living donor liver transplants (LDLTs) are being considered in this group of patients as eligibility for deceased donor liver transplant is restricted to those aged 65 years and younger. However, the short- and long-term outcomes of this group have not been reported from India, which does not have a robust national health scheme. The aim of this study was to provide guidelines for transplant in this group.

METHODS

All patients aged 60 years and older (group 1) who underwent LDLT in our centre between January 2006 and December 2017 were studied. A propensity score-matched group in 1:2 ratio was created with comparable sex and Model for End-Stage Liver Disease score (group 2). The 2 groups were compared for duration of hospital stay, surgical complications, hospital mortality and 1-, 3- and 5-year survival.

RESULTS

Group 1 consisted of 207 patients, and group 2 had 414 patients. The number of patients in group 1 gradually increased with time from 4 in 2006 to 33 in 2017 accounting for 15% of total cases. Group 1 had more patients with viral hepatitis, NASH and HCC, and they had a higher 30-day mortality due to cardiorespiratory complications. Although 1- and 3-year survival was similar, the 5-year survival was significantly lower in group 1.

CONCLUSION

Five-year survival was lower in the elderly group due to cardiorespiratory complications and recurrence of HCC. Outcomes in the elderly group can be improved with better patient selection and preventing HCC recurrence.

Endoscopic treatment of biliary complications in donors after living donor liver transplantation in a high volume transplant center

BACKGROUND/AIMS

Although living donor liver transplantation (LDLT) has been accepted as a primary treatment for adults with end-stage liver disease, concerns about donor health have been emerged. As LDLT is technically complex, it creates perioperative morbidity and mortality risk in donors. Biliary complications such as stricture and leakage are seen most frequently in donors after liver transplantation. While some of these complications get treated with conservative approach, endoscopic, surgical, and percutaneous interventions may be required in some others. We aimed to present endoscopic retrograde cholangiography (ERC) results in donors who developed biliary complications after LDLT.

MATERIALS AND METHODS

Between June 2010 and January 2018, a total of 1521 donors (1291 right lobe grafts, 230 left lobe grafts) of patients who underwent LDLT, were retrospectively reviewed. 63 donors who underwent ERC due to biliary complication, were included in the study.

RESULTS

Biliary stricture was found in 1.6% (25/1521), biliary leakage in 2.1% (33/1521), and stricture and leakage together in 0.3% (5/1521) donors. Our endoscopic success rates in patients with biliary leakage, biliary stricture, and stricture and leakage were 85% (28/33), 92% (23/25), and 80% (4/5), respectively. Surgical treatment was performed on 12.6% (8/63) donors who failed ERC.

CONCLUSION

We found that ERC is a successful treatment for post-LDLT donors who have biliary complications.

Fairchild AH, Hohenwalter EJ, Gipson MG, Al-Refaie WB, Braun AR, Cash BD, Kim CY, Pinchot JW, Scheidt MJ, Schramm K, Sella DM, Weiss CR, Lorenz JM. ACR Appropriateness Criteria® Radiologic Management of Biliary Obstruction

Biliary obstruction is a serious condition that can occur in the setting of both benign and malignant pathologies. In the setting of acute cholangitis, biliary decompression can be lifesaving; for patients with cancer who are receiving chemotherapy, untreated obstructive jaundice may lead to biochemical derangements that often preclude continuation of therapy unless biliary decompression is performed (see the ACR Appropriateness Criteria® topic on "Jaundice"). Recommended therapy including percutaneous decompression, endoscopic decompression, and/or surgical decompression is based on the etiology of the obstruction and patient factors including the individual's anatomy. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision include an extensive analysis of current medical literature from peer reviewed journals and the application of well-established methodologies (RAND/UCLA Appropriateness Method and Grading of Recommendations Assessment, Development, and Evaluation or GRADE) to rate the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where evidence is lacking or equivocal, expert opinion may supplement the available evidence to recommend imaging or treatment.

Is Surgery Necessary? Endoscopic Management of Post-transplant Biliary Complications in the Modern Era

BACKGROUND

Biliary complications are common following liver transplantation (LT) and traditionally managed with Roux-en-Y hepaticojejunostomy. However, endoscopic management has largely supplanted surgical revision in the modern era. Herein, we evaluate our experience with the management of biliary complications following LT.

METHODS

All LTs from January 2013 to June 2018 at a single institution were reviewed. Patients with biliary bypass prior to, or at LT, were excluded. Patients were grouped by biliary complication of an isolated stricture, isolated leak, or concomitant stricture and leak (stricture/leak).

RESULTS

A total of 462 grafts were transplanted into 449 patients. Ninety-five (21%) patients had post-transplant biliary complications, including 56 (59%) strictures, 28 (29%) leaks, and 11 (12%) stricture/leaks. Consequently, the overall stricture, leak, and stricture/leak rates were 12%, 6%, and 2%, respectively. Endoscopic management was pursued for all stricture and stricture/leak patients, as well as 75% of leak patients, reserving early surgery only for those patients with an uncontrolled leak and evidence of biliary peritonitis. Endoscopic management was successful in the majority of patients (stricture 94%, leak 90%, stricture/leak 90%). Only six patients (5.6%) received additional interventions-two required percutaneous transhepatic cholangiography catheters, three underwent surgical revision, and one was re-transplanted.

CONCLUSIONS

Endoscopic management of post-transplant biliary complications resulted in long-term resolution without increased morbidity, mortality, or graft failure. Successful endoscopic treatment requires collaboration with a skilled endoscopist. Moreover, multidisciplinary transplant teams must develop treatment protocols based on the local availability and expertise at their center.

Salvage PTBD in post living donor liver transplant patients with biliary complications-a single centre retrospective study

OBJECTIVE

To study the outcome of salvage percutaneous transhepatic biliary drainage (PTBD) in complex and technically challenging post-liver transplant (LT) biliary complications and analyse the reason for failure of endoscopic retrograde cholangiopancreatography (ERCP).

METHODS AND MATERIALS

Hospital data were searched for all LT patients with biliary complications requiring salvage PTBD (upon failure of ERCP) from January 2010 to May 2017. Patients who underwent primary PTBD were excluded. Patients clinical and biochemical parameters were analysed for clinical, biochemical and imaging response, stent-free survival and the reason for ERCP failure.

RESULTS

Salvage PTBD was performed in 32 patients with post-LT biliary stricture/bile leak presenting with deranged liver function in 12 (37.5%), cholangitis in 12 (37.5%) and cholangitis with cholangitic abscess in remaining 8 (25%) patients. Of 32 patients, 20 (62.5%) already had plastic biliary stent placed by ERCP, while in remaining (n = 12, 37.5%) a wire could not be negotiated across stricture by ERCP. These patients were found to have long/tortuous stricture (n = 18, 56.3%) and multiple duct disconnection at anastomosis (n = 14, 43.7%). Immediate as well as sustained (persisting for a year or more) clinical and biochemical improvement was seen in 26 (81.3%) patients, while failure of resolution of sepsis and death occurred in remaining 6 (18.8%).

CONCLUSION

Salvage PTBD is an effective treatment in difficult-to-treat post-LT biliary strictures with deranged liver functions with or without cholangitis/cholangitic abscess. It can reduce graft loss with improved clinical outcome. Post-LT ductal anatomy at anastomosis is important to decide the appropriate approach (ERCP/PTBD).

ADVANCES IN KNOWLEDGE

(1). PTBD as a salvage procedure in difficult anatomy or upon failure of ERCP-based intervention is effective and a good alternative strategy. (2). Postoperative surgical anatomy (type & length of stricture, number of ductanastomosis, location and graft-recipient duct alignment) is the key factor indeciding the appropriate therapeutic procedure.

Endoscopic management of biliary strictures post-liver transplantation

Biliary complications play a significant role in morbidity of liver transplant recipients. Biliary strictures occur between 10%-25% of patients with a higher incidence in living donor recipients compared to deceased donors. Strictures can be classified as either anastomotic or non-anastomotic and may be related to ischemic events. Endoscopic management of biliary strictures in the post-transplant setting has become the preferred initial approach due to adequate rates of resolution of anastomotic and non-anastomotic strictures (NAS). However, several factors may increase complexity of the endoscopic approach including surgical anatomy, location, number, and severity of bile duct strictures. Many endoscopic tools are available, however, the approach to management of anastomotic and NAS has not been standardized. Multi-disciplinary techniques may be necessary to achieve optimal outcomes in select patients. We will review the risk factors associated with the development of bile duct strictures in the post-transplant setting along with the efficacy and complications of current endoscopic approaches available for the management of bile duct strictures.

Endoscopic Management of Biliary Issues in the Liver Transplant Patient

Biliary complications remain a common problem after liver transplantation (LT). The therapeutic endoscopist encounters a variety of situations in LT including strictures at the duct-to-duct biliary anastomosis, strictures elsewhere in the biliary tree caused by an ischemic injury, and bile leaks at the anastomosis or from the cut surface and stone disease. Biliary complications lead to significant morbidity and occasionally reduced graft and patient survival. Several factors increase the risk of strictures and leaks. Endoscopic intervention in experienced hands is successful in the management of biliary complications following LT and percutaneous or surgical correction should seldom be required.

Arterial blood gas test to decide whether to reconstruct single or both the arteries in living donor liver transplantation

Background

The graft used in living donor liver transplantation (LDLT) sometimes has two hepatic arteries. This study aimed to introduce arterial-blood gas (ABG) test on the decision on whether to reconstruct a single or both arteries in LDLT.

Methods

Patients with a right lobe graft with two hepatic arteries were enrolled from the prospectively maintained database of our institution. After anastomosis of one of two arteries, the back-bleeding from the second hepatic artery was taken for ABG test. Depending on the results, the second artery was anastomosed or ligated.

Results

Between January 2012 and December 2017, a total of 372 patients underwent LDLT, and 21 living donors had two right hepatic arteries. Based on ABG test results, a single anastomosis was created in 15 recipients while double anastomoses were performed in the remaining 6 recipients. All the patients had an uneventful recovery and were discharged in good conditions. Neither hepatic artery thrombosis nor liver dysfunction was observed during the median follow-up of 26 months (range, 6-71 months). The overall incidence of biliary complications was 9.5% (2/21). Bile leakage arose in one patient with two hepatic artery reconstructions, and the patient subsequently developed biliary stricture. Biliary stricture occurred in another patient with one hepatic artery reconstruction. The biliary complications were successfully managed with endoscopic or percutaneous intervention.

Conclusions

ABG test provides a good measure for deciding whether to reconstruct single or both arteries in LDLT.

Endoscopic treatment of biliary complications in left lobe living donor liver transplantation

Purpose

Almost all of the publications regarding the treatment of biliary complications after liver transplantation are related to biliary complications after right lobe living donor liver transplantation (LDLT) and cadaveric liver transplantation (LT). The number of publications regarding endoscopic treatment of biliary complications after left lobe LDLT is negligible. In this study, we aimed to present the results of endoscopic treatments applied in the management of biliary complications developed in left-lobe duct-to-duct LDLT patients.

Patients and methods

Between 2008 and 2018, patients with duct-to-duct anastomosis who underwent ERCP due to biliary complication after left lobe LDLT were included in the study. Clinical data included patient demographics, indications for LDLT, duration till the first ERCP after LDLT, number of ERCP procedures, ERCP indications (stricture or leak), and treatment outcomes, including the need for percutaneous and surgical interventions.

Results

Among 13 patients who underwent ERCP, 2 (15%) had biliary leakage and 11 (8%) had an anastomotic stricture. Our endoscopic success rate was 100% in patients with biliary stricture. Despite the implementation of ERCP on two patients with leakage, they died due to the biliary complication.

Conclusion

Our results suggest that endoscopic treatment methods are successful in the management of biliary stricture complication in patients with left lobe LDLT and duct-to-duct anastomosis. Although our findings show that endoscopic treatments fail when there is a leakage after left lobe LDLT, there is a need for further studies that include more patients to reach a definite conclusion.

Biliary strictures complicating living donor liver transplantation: Problems, novel insights and solutions

Biliary stricture complicating living donor liver transplantation (LDLT) is a relatively common complication, occurring in most transplant centres across the world. Cases of biliary strictures are more common in LDLT than in deceased donor liver transplantation. Endoscopic management is the mainstay for biliary strictures complicating LDLT and includes endoscopic retrograde cholangiography, sphincterotomy and stent placement (with or without balloon dilatation). The efficacy and safety profiles as well as outcomes of endoscopic management of biliary strictures complicating LDLT is an area that needs to be viewed in isolation, owing to its unique set of problems and attending complications; as such, it merits a tailored approach, which is yet to be well established. The diagnostic criteria applied to these strictures are not uniform and are over-reliant on imaging studies showing an anastomotic narrowing. It has to be kept in mind that in the setting of LDLT, a subjective anastomotic narrowing is present in most cases due to a mismatch in ductal diameters. However, whether this narrowing results in a functionally significant narrowing is a question that needs further study. In addition, wide variation in the endotherapy protocols practised in most centres makes it difficult to interpret the results and hampers our understanding of this topic. The outcome definition for endotherapy is also heterogenous and needs to be standardised to allow for comparison of data in this regard and establish a clinical practice guideline. There have been multiple studies in this area in the last 2 years, with novel findings that have provided solutions to some of these issues. This review endeavours to incorporate these new findings into the wider understanding of endotherapy for biliary strictures complicating LDLT, with specific emphasis on diagnosis of strictures in the LDLT setting, endotherapy protocols and outcome definitions. An attempt is made to present the best management options currently available as well as directions for future research in the area.

Endoscopic management of bile leaks after liver transplantation: An analysis of two high-volume transplant centers

Background

Bile leak after liver transplantation (LT) is commonly treated with endoscopic retrograde cholangiopancreatography (ERCP); however, there are limited data regarding the optimal treatment strategy.

Objective

We aimed to examine the role of ERCP in LT recipients with bile leaks at two large institutions.

Methods

We reviewed all ERCPs performed in LT recipients with bile leak and duct-to-duct biliary anastomosis at two high-volume transplant centers.

Results

Eighty patients were included. Forty-seven (59%) patients underwent ERCP with plastic stent placement (with or without sphincterotomy) and 33 patients (41%) underwent sphincterotomy alone. Complete resolution was obtained in 94% of the stent group vs. 58% of the sphincterotomy group (p < 0.01). There was no difference in three-month survival among both groups. Percutaneous transhepatic therapy and surgery were required in 4% and 6% in the stent group vs. 12% and 42% in the sphincterotomy group, respectively (p = 0.22 and p < 0.001). The only predictive factor of bile leak resolution was stent placement.

Conclusion

ERCP with plastic stent placement is highly successful and more effective than sphincterotomy alone for post-LT bile leak treatment. These results indicate that ERCP and plastic stent placement should be considered the standard of care for the treatment of bile leaks in LT.

Endoscopic therapy for biliary strictures complicating living donor liver transplantation: Factors predicting better outcome

AIM

To identify factors predicting outcome of endoscopic therapy in bile duct strictures (BDS) post living donor liver transplantation (LDLT).

METHODS

Patients referred with BDS post LDLT, were retrospectively studied. Patient demographics, symptoms (Pruritus, Jaundice, cholangitis), intra-op variables (cold ischemia time, blood transfusions, number of ducts used, etc.), peri-op complications [hepatic artery thrombosis (HAT), bile leak, infections], stricture morphology (length, donor and recipient duct diameters) and relevant laboratory data both pre- and post-endotherapy were studied. Favourable response to endotherapy was defined as symptomatic relief with > 80% reduction in total bilirubin/serum gamma glutamyl transferase. Statistical analysis was performed using SPSS 20.0.

RESULTS

Forty-one patients were included (age: 8-63 years). All had right lobe LDLT with duct-to-duct anastomosis. Twenty patients (48.7%) had favourable response to endotherapy. Patients with single duct anastomosis, aggressive stent therapy (multiple endoscopic retrograde cholagiography, upsizing of stents, dilatation and longer duration of stents) and an initial favourable response to endotherapy were independent predictors of good outcome (P < 0.05). Older donor age, HAT, multiple ductal anastomosis and persistent bile leak (> 4 wk post LT) were found to be significant predictors of poor response on multivariate analysis (P < 0.05).

CONCLUSION

Endoscopic therapy with aggressive stent therapy especially in patients with single duct-to-duct anastomosis was associated with a better outcome. Multiple ductal anastomosis, older donor age, shorter duration of stent therapy, early bile leak and HAT were predictors of poor outcome with endotherapy in these patients.

Changing pattern of biliary complications in an evolving liver transplant unit

Biliary complications (BCs) remain a significant cause of morbidity following liver transplantation (LT). This series of 640 LT recipients with a blend of living and deceased donor transplants was analyzed to determine the incidence, risk factors, management protocol, and outcomes in these patients. Review of a prospectively collected database of transplant recipients operated between August 2009 and June 2016 was performed. Patients were divided into those with and without BCs and data analyzed. The 640 LT recipients from both living (n = 481) and deceased donors (n = 159) were evaluated for BCs. The overall incidence of BCs was 13.7%. It reduced from 23% to 5% (P = 0.003) over a 6-year period. Risk factors for BCs on multivariate analysis were living donor liver transplantation, prolonged time to rearterialization, recipient age above 16 years, prolonged cold ischemia time (CIT) after deceased donor liver transplantation, and biliary reconstruction performed by anyone but the senior author. One-fifth of bile leaks progressed to strictures, and 40% of strictures followed leaks. Endoscopic therapy resolved 60% of the strictures. Surgical repair of strictures was successful in 90% of those in whom endoscopy failed, those who could not undertake the follow-up schedules endoscopic therapy entails, and those presenting with late strictures. BCs significantly prolonged hospital stay but did not alter survival after LT. BCs affect 1 in 7 recipients, although they are not associated with increased mortality. The frequency of these complications is influenced by potentially modifiable factors like evolving surgical expertise and CIT. Liver Transplantation 23 478-486 2017 AASLD.

Early Acute Severe HCV Recurrence After Transplantation: From Universal Mortality to Cure

Acute severe recurrence of hepatitis C virus (HCV) after solid organ transplant is associated with high mortality. Pegylated interferon and ribavirin are suboptimal in treatment of this severe form of recurrence. We report 4 cases of acute severe HCV recurrence (within 6 months after transplant), including 3 cases with fibrosing cholestatic hepatitis treated with sofosbuvir and ribavirin. All four patients achieved a rapid suppression of HCV RNA with a normalization of liver function tests within 4 weeks of starting therapy. All patients were HCV RNA negative at 12 weeks after stopping therapy. The combination was found to be safe as anemia was the only adverse effect, which developed in 2 patients (1 patient required blood transfusion, while another managed with erythropoietin). Sofosbuvir and ribavirin appear to be safe and efficacious in treatment of acute severe HCV recurrence after organ transplant.

Evaluation of biliary complications on magnetic resonance cholangiopancreatography and comparison with direct cholangiography after living-donor liver transplantation

AIM

To evaluate the imaging characteristics of biliary complications following liver transplantation on magnetic resonance cholangiopancreatography (MRCP) and its diagnostic accuracy in comparison with direct cholangiography.

MATERIAL AND METHODS

In this prospective study, 34 patients being evaluated for possible biliary complications after living-donor liver transplantation (LDLT) with abnormal MRCP findings were followed up for information regarding direct cholangiography either endoscopic retrograde cholangiopancreatography (ERCP) or percutaneous transhepatic cholangiography (PTC) within 7 days of MRCP. Twenty-nine patients underwent ERCP and five patients underwent PTC.

RESULTS

Compared to findings at direct cholangiography, MRCP presented 96.9% sensitivity, 96.9% positive predictive value, and 94.1% accuracy for the detection of biliary complications. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for detection of anastomotic strictures, biliary leak, and biliary stone or sludge on MRCP was found to be 100%, 84.6%, 91.3%, 100% and 94.1%; 72.7%, 95.7%, 88.9%, 88% and 88.2%; 80%, 100%, 100%, 96.7% and 97.1%, respectively.

CONCLUSION

MRCP is a reliable non-invasive technique to evaluate the biliary complications following LDLT. MRCP should be the imaging method of choice for diagnosis in this setting and direct cholangiography should be reserved for cases that need therapeutic interventions.

Endoscopic approach for management of biliary strictures in liver transplant recipients: A systematic review and meta-analysis

The most common biliary complication after liver transplantation is anastomotic stricture (AS) and it can occur isolated or in combination with other complications. Liver graft from a cadaveric donor or a living donor has an influence on the incidence of biliary strictures as well as on the response to endoscopic treatment. Endoscopic treatment using balloon dilation and insertion of biliary stents by endoscopic retrograde cholangiopancreatography (ERCP) is the initial approach to these complications.

AIM

The aim of this article is to compare different endoscopic techniques to treat post-liver transplantation biliary strictures.

METHODS

The search was carried out on MEDLINE, EMBASE, Scielo-LILACS and Cochrane Library databases through June 2015. A total of 1100 articles were retrieved. Ten clinical trials were analyzed, and seven were included in the meta-analysis.

CONCLUSIONS

The endoscopic treatment of AS was equally effective when compared the use of fully covered self-expandable metal stents (FCSEMS) vs. plastic stents, but the use of FCSEMS was associated with a lower complication risk. The treatment of AS with balloon dilation or balloon dilation associated with plastic stents presented similar results. Deceased donor liver transplantation reduced the risk of biliary stenosis and the endoscopic treatment in these patients was more effective when compared with Living donor liver transplantation.

Management issues in post living donor liver transplant biliary strictures

Biliary complications are common after living donor liver transplant (LDLT) although with advancements in surgical understanding and techniques, the incidence is decreasing. Biliary strictures are more common than leaks. Endoscopic retrograde cholangiopancreatography (ERCP) is the first line modality of treatment of post LDLT biliary strictures with a technical success rate of 75%-80%. Most of ERCP failures are successfully treated by percutaneous transhepatic biliary drainage (PTBD) and rendezvous technique. A minority of patients may require surgical correction. ERCP for these strictures is technically more challenging than routine as well post deceased donor strictures. Biliary strictures may increase the morbidity of a liver transplant recipient, but the mortality is similar to those with or without strictures. Post transplant strictures are short segment and soft, requiring only a few session of ERCP before complete dilatation. Long-term outcome of patients with biliary stricture is similar to those without stricture. With the introduction of new generation cholangioscopes, ERCP success rate may increase, obviating the need for PTBD and surgery in these patients.

Imaging of biliary complications in recipients of right-lobe living donor liver transplantation

Right-lobe living donor liver transplantation (RL-LDLT) is a common method devised in order to fulfill the demands of donor organ shortage in adult patients with end-stage liver diseases. However, biliary complications remain as the "Achilles' heel" of RL-LDLT, with wide variety of incidence among transplantation centers. Patients with biliary complications after RL-LDLT may have similar clinical presentations to those with other causes of graft dysfunction. Therefore, radiological evaluation plays a key role for differential diagnosis of such complications. In this article, we discuss the various methods of biliary reconstruction and imaging findings of common and uncommon biliary complications in recipients of RL-LDLT.

En Bloc Hilar Dissection of the Right Hepatic Artery in Continuity with the Bile Duct: a Technique to Reduce Biliary Complications After Adult Living-Donor Liver Transplantation

OBJECTIVE

Techniques that preserve the right hepatic artery and the common bile duct in continuity during the dissection may be associated with lower rates of biliary complications in living-donor liver transplants. This study sought to determine whether en bloc hilar dissections were associated with fewer biliary complications in living-donor liver transplants.

METHODS

This was a retrospective review of 41 adult LDLTs performed in a single, liver transplant center between February 2007 and September 2014. The primary outcome of interest was the occurrence of at least one of the following biliary complications: anastomotic leak, stricture, or biloma. The primary predictor of interest was the hilar dissection technique: conventional hilar dissection vs. en bloc hilar dissection.

RESULTS

A total of 41 LDLTs were identified, 24 had a conventional, and 17 an en bloc hilar biliary dissection. The occurrence of any biliary complication was significantly more common in the conventional hilar dissection group compared to the en bloc hilar dissection group (66.7 vs. 35.3%, respectively, p = 0.047). In particularly, anastomotic strictures were significantly more common in the conventional hilar dissection group compared to the en bloc hilar dissection group (54.2 vs. 23.5%., respectively, p = 0.049).

CONCLUSION

En bloc hilar dissection technique may decrease biliary complication rates in living donor liver transplants.

Indications and outcomes of an endoscopic approach under laparotomy for the treatment of bilioenteric anastomotic strictures

BAS is a potentially life-threatening complication of LDLT. The aim of this study was to report on the indications and outcomes of an endoscopic approach under laparotomy being used in our institution to treat BAS after LDLT, using hepaticojejunostomy, for a small case series. Eighty-three patients underwent an LDLT in our institution between 1991 and 2014. Retrospective chart review indicated that 10 of these patients developed BAS and were included in our analysis. The endoscopic approach under laparotomy was used in three patients who developed BAS 10 yr or more after their LDLT and in whom a percutaneous transhepatic approach and an endoscopic approach had failed. The course of recovery post-operatively was unremarkable for two of the three patients who underwent the endoscopic approach under laparotomy. One patient required follow-up laparotomy to treat a perforation of the bowel causing acute peritonitis. At follow-up one yr post-operatively, the stent tube was removed in two patients who recovered fully. The other patient had full recovery with the stent remaining in situ. The endoscopic approach under laparotomy could be a safe and promising option in the treatment of BAS to avoid surgical re-anastomosis.

Beneficial Effect of a Resorbable Biliary Stent in Living Donor Liver Transplantation

BACKGROUND

Living donor liver transplantation (LDLT) entails a significant number of bile duct complications. We aimed to diminish the biliary complication rate with the use of a resorbable biliary stent (RBS) during LDLT. The objective of this study is to describe the surgical techniques and the associated outcomes, especially in terms of safety, of RBS use in LDLT.

METHODS

From 2011 to 2014, 12 LDLT recipients were enrolled in a clinical trial with the use of a specifically designed RBS. These patients were followed according to the clinical protocol. Specific complications derived from RBS as well as biliary complications were recorded.

RESULTS

One patient underwent early retransplantation due to a small-for-size syndrome. None of the patients had a complication attributable to the placement, remaining in place, or degradation of the stent. Four of the remaining patients presented with a biliary complication: 1 (9.1%) with a biliary leak alone, 1 (9.1%) with a biliary stenosis alone, and 2 (18.2%) with both. However, none of the leaks could be directly attributed to the RBS. Patient and graft 1-year survival was 100 and 91.7%, respectively.

CONCLUSION

The use of an RBS in LDLT is not associated with complications, and initial results regarding efficacy and safety are encouraging. The need for a larger and prospective study is warranted.

Targeting the Achilles' heel of adult living donor liver transplant: Corner-sparing sutures with mucosal eversion technique of biliary anastomosis

Biliary complications are regarded as the Achilles' heel of liver transplantation, especially for living donor liver transplantation (LDLT) due to smaller, multiple ducts and difficult ductal anatomy. Overall biliary complications reported in most series are between 10% and 30%. This study describes our modified technique of biliary anastomosis and its effects on incidence of biliary complications. This was a single-center retrospective study of 148 adult LDLT recipients between December 2011 and June 2014. Group 1 (n = 40) consisted of the first 40 patients for whom the standard technique of biliary anastomosis (minimal hilar dissection during donor duct division, high hilar division of the recipient bile duct, and preservation of the recipient duct periductal tissue) was used. Group 2 (n = 108) consisted of 108 patients for whom biliary anastomosis was done with the addition of corner-sparing sutures and mucosal eversion of the recipient duct to the standard technique. Primary outcome measures included biliary complications (biliary leaks and strictures). Biliary complications occurred in 7/40 patients in group 1 (17.5%) and in 4/108 patients in group 2 (3.7%). The technical factors mentioned above are aimed at preserving the blood supply of the donor and recipient ducts and hold the key for minimizing biliary complications in adult-to-adult LDLT.

Bile duct kinking after adult living donor liver transplantation: Case reports and literature review

Regeneration of the partial allograft and the growth of children may cause kinking of the biliary tract after pediatric living donor liver transplantation (LDLT), but bile duct kinking after adult LDLT is rarely reported. We herein presented two patients who suffered from anastomotic strictures caused by severe bile duct kinking after LDLT. The first patient was a 57-year-old woman with hepatitis B virus (HBV)-related liver cirrhosis, who developed biliary stricture 5 months after receiving right-lobe LDLT. Subsequently, endoscopic and percutaneous treatments were attempted, but both failed to solve the problem. The second was a 44-year-old woman also having HBV-related liver cirrhosis. Biliary stricture occurred 14 months after LDLT. Likewise, the guide wire failed to pass through the stricture when endoscopic interventions were conducted. Afterwards, both of the two cases underwent reexploration, showing that compensatory hypertrophy of the allografts resulted in kinking and sharp angulation of the bile ducts, and the anastomotic sites were found to be severely stenotic. Finally, re-anastomosis by Roux-en-Y procedure was successfully performed, and long-term stenosis-free survival was achieved in both of them. Our experience suggests that bile duct kinking after LDLT may play a role in the high incidence of anastomotic strictures in adult LDLT recipients, which may also result in the treatment failure of the non-surgical techniques for anastomotic strictures. Re-anastomosis in the form of Roux-en-Y hepaticojejunostomy is an effective surgical option for the treatment of such a condition.

Optimal line of hepatotomy for left lateral living donor liver transplantation according to the anatomical variations of left hepatic duct system

Multiple duct anastomoses during LLS transplantation increase the incidence of biliary complications. The optimal plane of hepatotomy that results in the least number of bile ducts at the surface was investigated according to LHD variations. Ducts of 30 human livers were injected with resin and LHD branching on 3D-CT reconstructions were analyzed. Ducts on the virtual hepatotomy surface were estimated in three splitting lines. Variations with subtypes were described. Ia (66.7%): ducts from segments (S.) II-III form a common trunk and S.IV duct joins it. Ib (10%): common trunk formed by ducts from S.II-S.III while S.IV duct joins the common hepatic duct. IIa (16.67%): S.IV duct drains into S.III duct. IIc (3.33%): S.IV duct drains into both S.II and S.III ducts. III (3.33%): trifurcation of S.II, S.III and S.IV ducts. When the virtual hepatotomy line was on the FL, there was a single duct for the anastomosis in 30% of cases but two, three, or four ducts in 53.3%, 10%, and 3.3%, respectively. Division 1 cm to the right of the FL resulted in one duct (70%), but S.IV duct injury may occur. LLS hepatotomy should not necessarily be performed along the FL. Variations must be taken into consideration to minimize the number of biliary anastomoses during liver implantation.

Spectrum of biliary complications following live donor liver transplantation

Liver transplantation is the optimal treatment for many patients with advanced liver disease, including decompensated cirrhosis, hepatocellular carcinoma and acute liver failure. Organ shortage is the main determinant of death on the waiting list and hence living donor liver transplantation (LDLT) assumes importance. Biliary complications are the most common post operative morbidity after LDLT and occur due to anatomical and technical reasons. They include biliary leaks, strictures and cast formation and occur in the recipient as well as the donor. The types of biliary complications after LDLT along with their etiology, presenting features, diagnosis and endoscopic and surgical management are discussed.

Endoscopic retrograde cholangiography for biliary anastomotic strictures after liver transplantation

Biliary complications after liver transplantation (LT) are an important cause of morbidity and mortality. In most cases, an anastomosis of the bile duct is performed as a duct-to-duct reconstruction, which makes endoscopic therapy with endoscopic retrograde cholangiography (ERC) feasible. Biliary anastomotic strictures (AS) are the most common cause of biliary complications. The early detection of an AS, which can sometimes be challenging given that its clinical presentation is often subtle, is of key importance to obtain high treatment success. In this review, we focus on the management of AS after LT with a special emphasis on ERC.

Dynamic expression of desmin, α-SMA and TGF-β1 during hepatic fibrogenesis induced by selective bile duct ligation in young rats

We previously described a selective bile duct ligation model to elucidate the process of hepatic fibrogenesis in children with biliary atresia or intrahepatic biliary stenosis. Using this model, we identified changes in the expression of alpha smooth muscle actin (α-SMA) both in the obstructed parenchyma and in the hepatic parenchyma adjacent to the obstruction. However, the expression profiles of desmin and TGF-β1, molecules known to be involved in hepatic fibrogenesis, were unchanged when analyzed by semiquantitative polymerase chain reaction (RT-PCR). Thus, the molecular mechanisms involved in the modulation of liver fibrosis in this experimental model are not fully understood. This study aimed to evaluate the molecular changes in an experimental model of selective bile duct ligation and to compare the gene expression changes observed in RT-PCR and in real-time quantitative PCR (qRT‐PCR). Twenty-eight Wistar rats of both sexes and weaning age (21-23 days old) were used. The rats were separated into groups that were assessed 7 or 60 days after selective biliary duct ligation. The expression of desmin, α-SMA and TGF-β1 was examined in tissue from hepatic parenchyma with biliary obstruction (BO) and in hepatic parenchyma without biliary obstruction (WBO), using RT-PCR and qRT‐PCR. The results obtained in this study using these two methods were significantly different. The BO parenchyma had a more severe fibrogenic reaction, with increased α-SMA and TGF-β1 expression after 7 days. The WBO parenchyma presented a later, fibrotic response, with increased desmin expression 7 days after surgery and increased α-SMA 60 days after surgery. The qRT‐PCR technique was more sensitive to expression changes than the semiquantitative method.

End-to-end ductal anastomosis in biliary reconstruction: indications and limitations

End-to-end ductal anastomosis is a physiologic biliary reconstruction that is commonly used in liver transplantation and less frequently in the surgical treatment of iatrogenic bile duct injuries. Currently, end-to-end ductal anastomosis is the biliary reconstruction of choice for liver transplantation in most adult patients. In recent years, it has also been performed for liver transplantation in children and in select patients with primary sclerosing cholangitis. The procedure is also performed in some patients with iatrogenic bile duct injuries, as it establishes physiologic bile flow. Proper digestion and absorption as well as postoperative endoscopic access are possible in patients who undergo end-to-end ductal anastomosis. It allows endoscopic diagnostic and therapeutic procedures in patients following surgery. This anastomosis is technically simple and associated with fewer early postoperative complications than the Roux-en-Y hepaticojejunostomy; however, end-to-end ductal anastomosis is not possible to perform in all patients. This review discusses the indications for and limitations of this biliary reconstruction, the technique used in liver transplantation and surgical repair of injured bile ducts, suture types and use of a T-tube.