Long-term efficacy of endoscopic stenting in patients with stricture of the biliary anastomosis after orthotopic liver transplantation

Post-Transplantation Cytomegalovirus Infection Interplays With the Development of Anastomotic Biliary Strictures After Liver Transplantation

Background: Anastomotic biliary stricture (ABS) remains the most frequent complication after liver transplantation (LT). This study aimed to identify new anastomotic biliary stricture risk factors, with a specific focus on postoperative events. Additionally, ABS management and impact on patient and graft survival were assessed.

Methods: All consecutive patients who underwent LT with duct-to-duct anastomosis between 2010 and 2019 were included. All patients who died within 90 days after LT due to non-ABS-related causes were excluded.

Results: Among 240 patients, 65 (27.1%) developed ABS after a median time of 142 days (range, 13–1265). Median follow-up was 49 months (7–126). Upon multivariable analysis, donor BMI (OR=0.509, p = 0.037), post-LT CMV primoinfection (OR = 5.244, p < 0.001) or reactivation (OR = 2.421, p = 0.015) and the occurrence of post-LT anastomotic biliary fistula (OR = 2.691, p = 0.021) were associated with ABS. Anastomotic technical difficulty did not independently impact the risk of ABS (OR = 1.923, p = 0.051). First-line ABS treatment was systematically endoscopic (100%), and required a median of 2 (range, 1–11) procedures per patient. Repeat LT was not required in patients developing ABS. The occurrence of ABS was not associated with overall patient survival (p = 0.912) nor graft survival (p = 0.521).

Conclusion: The risk of developing ABS after LT seems driven by the occurrence of postoperative events such as CMV infection and anastomotic fistula. In this regard, the role of CMV prophylaxis warrants further investigations.

Non-operative management of biliary complications after Liver Transplantation in pediatric patients: A 30-year experience

BACKGROUND

To evaluate the efficacy of percutaneous and endoscopic therapeutic interventions for biliary strictures and leaks following LT in children.

METHODS

Retrospective analysis of 49 consecutive pediatric liver transplant recipients (27 girls, 22 boys, mean age at transplant 3.9 years) treated at our institution from 1989 to 2019 for biliary leak and/or biliary stricture was performed. Minimally invasive approach was considered clinically successful if it resulted in patency of the narrowed biliary segment and/or correction of the biliary leak.

RESULTS

Forty-two patients had a stricture at the biliary anastomosis; seven had a biliary leak. After an average 13.8 years of follow-up, long-term clinical success with minimally invasive treatment (no surgery or re-transplant) was achieved for 24 children (57%) with biliary stricture and 4 (57%) with biliary leaks. Eight patients required re-transplant; however, only one was due to failure of both percutaneous and surgical management. For biliary strictures, failure of non-surgical management was associated with younger age at stricture diagnosis (p < .02).

CONCLUSIONS

Percutaneous and endoscopic management of biliary strictures and leaks after LT in children is associated with a durable result in >50% of children.

Management of anastomotic biliary stricture after liver transplantation and impact on survival

BACKGROUND

Anastomotic biliary strictures (AS) is the main surgical complication after liver transplantation. The aims of this study are to investigate the risk factors of AS, its management and its impact on overall survival and survival of the graft.

METHODS

All patients who had received a liver transplantation with duct-to-duct anastomosis at Toulouse University Hospital between 2010 and 2016 were included.

RESULTS

Of 225 included patients, 56 (24.9%) presented with AS. The median time to discovery of AS was 83 days and 69.6% of the AS appeared within 6 months. Transplantation in critically ill patients, with a liver score >800 points, was an independent predictive factor of survival (P = 0.003). The first-line treatment was endoscopic (87.5%), with a success rate of 79.6% and a median of 4 procedures per patient in 12 months. In cases of failure of endoscopic therapy, percutaneous treatment had a high failure rate (50%). AS had no impact in terms of overall survival or in terms of graft survival.

CONCLUSION

AS do not have any repercussions on patient or graft survival, requiring long endoscopic treatment with multiple procedures. In the event of failure of this first-line endoscopic treatment, it seems preferable to turn directly towards surgical repair.

Biliary strictures after liver transplantation

Biliary strictures are one of the most common complications following liver transplantation, representing an important cause of morbidity and mortality in transplant recipients. The reported incidence of biliary stricture is 5% to 15% following deceased donor liver transplantations and 28% to 32% following living donor liver transplantations. Bile duct strictures following liver transplantation are easily and conveniently classified as anastomotic strictures (AS) or non-anastomotic strictures (NAS). NAS are characterized by a far less favorable response to endoscopic management, higher recurrence rates, graft loss and the need for retransplantation. Current endoscopic strategies to correct biliary strictures following liver transplantation include repeated balloon dilatations and the placement of multiple side-by-side plastic stents. Endoscopic balloon dilatation with stent placement is successful in the majority of AS patients. In patients for whom gaining biliary access is technically difficult, a combined endoscopic and percutaneous/surgical approach proves quite useful. Future directions, including novel endoscopic retrograde cholangiopancreatography techniques, advanced endoscopy, and improved stents could allow for a decreased number of interventions, increased intervals before retreatment, and decreased reliance on percutaneous and surgical modalities. The aim of this review is to detail the present status of endoscopy in the diagnosis, treatment, outcome, and future directions of biliary strictures related to orthotopic liver transplantation from the viewpoint of a clinical gastroenterologists.

Biliary strictures after liver transplantation

Biliary strictures are one of the most common complications following liver transplantation, representing an important cause of morbidity and mortality in transplant recipients. The reported incidence of biliary stricture is 5% to 15% following deceased donor liver transplantations and 28% to 32% following living donor liver transplantations. Bile duct strictures following liver transplantation are easily and conveniently classified as anastomotic strictures (AS) or non-anastomotic strictures (NAS). NAS are characterized by a far less favorable response to endoscopic management, higher recurrence rates, graft loss and the need for retransplantation. Current endoscopic strategies to correct biliary strictures following liver transplantation include repeated balloon dilatations and the placement of multiple side-by-side plastic stents. Endoscopic balloon dilatation with stent placement is successful in the majority of AS patients. In patients for whom gaining biliary access is technically difficult, a combined endoscopic and percutaneous/surgical approach proves quite useful. Future directions, including novel endoscopic retrograde cholangiopancreatography techniques, advanced endoscopy, and improved stents could allow for a decreased number of interventions, increased intervals before retreatment, and decreased reliance on percutaneous and surgical modalities. The aim of this review is to detail the present status of endoscopy in the diagnosis, treatment, outcome, and future directions of biliary strictures related to orthotopic liver transplantation from the viewpoint of a clinical gastroenterologists.

Endoscopic treatment of postorthotopic liver transplantation anastomotic biliary strictures with maximal stent therapy (with video)

BACKGROUND

The optimal endoscopic protocol for treating postorthotopic liver transplantation (OLT) anastomotic biliary strictures (ABSs) has not been established.

OBJECTIVE

To review the technique and outcomes of endoscopic retrograde cholangiopancreatography (ERCP) with maximal stenting for post-OLT ABSs at our institution.

DESIGN

Retrospective study.

SETTING

Tertiary-care center.

PATIENTS

Eighty-three patients with a diagnosis of ABS.

INTERVENTIONS

ERCP with balloon dilation and maximal stenting.

MAIN OUTCOME MEASUREMENTS

Stricture resolution, stricture recurrence, and complication rates.

RESULTS

Of 83 patients, 69 completed treatment, of whom 65 (94%) achieved resolution and 4 (6%) required hepaticojejunostomy (HJ). The remaining 14 patients who did not achieve a study endpoint were excluded (9 deaths or redo OLT unrelated to biliary disease, and 5 without follow-up). Comparing the resolution group and the HJ group, there were, respectively, 8.0 and 3.5 total stents (P = .021), 2.5 and 1.3 stents per ERCP (P = .018) (maximum = 9), 4.2 and 2.8 ERCPs (P = .15), and 20 and 22 months from OLT to ABS diagnosis (P = .19). There were 2 cases of ERCP pancreatitis (0.7%) and 2 cases of periprocedural bacteremia of 286 total ERCPs and no episodes of cholangitis caused by stent occlusion. In a median follow-up of 11 months (range 0-39), 2 (3%) patients had ABS recurrence that was successfully re-treated with ERCP. A multivariate Cox model demonstrated that treatment success was directly related to the number of stents used in total and per ERCP.

LIMITATIONS

Retrospective study, single endoscopist.

CONCLUSIONS

Our maximal stenting protocol for ABSs is effective, safe, rarely associated with ABS recurrence, and conducive to less frequent stent exchange and therefore fewer ERCPs compared with conventional treatment.

Biliary complications after liver transplantation: A review

After liver transplantation, the prevalence of complications related to the biliary system is 6-35%. In recent years, the diagnosis and treatment of biliary problems has changed markedly. The two standard methods of biliary reconstruction in liver transplant recipients are the duct-to-duct choledochocholedochostomy and the Roux-en-Y-hepaticojejunostomy. Biliary leakage occurs in approximately 5-7% of transplant cases. Leakage from the site of anastomosis, the T-tube exit site and donor or recipient remnant cystic duct is well described. Symptomatic bile leakage should be treated by stenting of the duct by endoscopic retrograde cholangiopancreatography (ERCP) or percutaneous transhepatic cholangiography (PTCD). Biliary strictures can occur at the site of the anastomosis (anastomotic stricture; AS) or at other locations in the biliary tree (non-anastomotic strictures; NAS). AS occur in 5-10% of cases and are due to fibrotic healing. Treatment by ERCP or PTCD with dilatation and progressive stenting is successful in the majority of cases. NAS can occur in the context of a hepatic artery thrombosis, or with an open hepatic artery (ischaemic type biliary lesions or ITBL). The incidence is 5-10%. NAS has been associated with various types of injury, e.g. macrovascular, microvascular, immunological and cytotoxic injury by bile salts. Treatment can be attempted with multiple sessions of dilatation and stenting of stenotic areas by ERCP or PTCD. In cases of localized diseased and good graft function, biliary reconstructive surgery is useful. However, a significant number of patients will need a re-transplant. When biliary strictures or ischaemia of the graft are present, stones, casts and sludge can develop.

Addition of adult-to-adult living donation to liver transplant programs improves survival but at an increased cost

Using outcomes data from the Adult-to-Adult Living Donor Liver Transplantation Cohort Study, we performed a cost-effectiveness analysis exploring the costs and benefits of living donor liver transplantation (LDLT). A multistage Markov decision analysis model was developed with treatment, including medical management only (strategy 1), waiting list with possible deceased donor liver transplantation (DDLT; strategy 2), and waiting list with possible LDLT or DDLT (strategy 3) over 10 years. Decompensated cirrhosis with medical management offered survival of 2.0 quality-adjusted life years (QALYs) while costing an average of $65,068, waiting list with possible DDLT offered 4.4-QALY survival and a mean cost of $151,613, and waiting list with possible DDLT or LDLT offered 4.9-QALY survival and a mean cost of $208,149. Strategy 2 had an incremental cost-effectiveness ratio (ICER) of $35,976 over strategy 1, whereas strategy 3 produced an ICER of $106,788 over strategy 2. On average, strategy 3 cost $47,693 more per QALY than strategy 1. Both DDLT and LDLT were cost-effective compared to medical management of cirrhosis over our 10-year study period. The addition of LDLT to a standard waiting list DDLT program is effective at improving recipient survival and preventing waiting list deaths but at a greater cost.

Biliary strictures following liver transplantation: past, present and preventive strategies

Biliary complications are still the major source of morbidity for liver transplant recipients. The reported incidence of biliary strictures is 5%-15% after deceased donor liver transplantation and 28%-32% after right-lobe live donor surgery. Presentation is usually within the first year, but the incidence is known to increase with longer follow-up. The anastomotic variant is due to technical factors, whereas the nonanastomotic form is due to immunological and ischemic events, which later may lead to graft loss. Endoscopic management of anastomotic strictures achieves a success rate of 70%-100%; it drops to 50%-75% for nonanastomotic strictures with a higher recurrence rate. Results of endoscopic maneuvers are disappointing for biliary strictures after live donor liver transplantation, and the success rate is 60%-75% for anastomotic strictures and 25%-33% for the nonanastomotic variant. Preventive strategies in the cadaveric donor include the standardization of the type of anastomosis and maintenance of a vascularized ductal stump. In right-lobe live donor livers, donor liver duct harvesting also involves a major risk. The concept of high hilar intrahepatic Glissonian dissection, dissecting the artery and the duct as one unit, use of microsurgical techniques for smaller ducts, use of ductoplasty, and flexibility in the performance of double ductal anastomosis are the critical components of the preventive strategies in the recipient. In the case of live donors, judicious use of intraoperative cholangiograms, minimal dissection of the hilar plate, and perpendicular transection of the duct constitute the underlying principals for obtaining a vascularized duct.

Classification and prognosis of intrahepatic biliary stricture after liver transplantation

Intrahepatic biliary stricture (IHBS) after liver transplantation (LT) may develop in patients with hepatic artery thrombosis, chronic rejection, or ABO incompatibility, as well as in patients with prolonged warm ischemia in non-heart-beating donor (NHBD) LT. However, the clinical course and methods of management have not been well defined for IHBSs to date. Thus, the purpose of this study was to provide a classification of post-LT IHBS and to investigate patient prognosis. Forty-four patients who developed IHBS after NHBD LT were enrolled. On the basis of the cholangiographic appearance, patients were classified into 4 groups: unilateral focal (UF, n=8), confluence (CO, n=10), bilateral multifocal (BM, n=21), and diffuse necrosis (DN, n=5). The UF type was defined as cases with stricture only in the segmental branch of the unilateral hemiliver; the CO type in cases with several strictures at confluence level; and the BM type in cases with multiple strictures bilaterally. Cases with diffuse obliteration of peripheral ducts or destruction of the central architectural integrity, over a long segment, were classified as the DN type. Five patients with the CO type required several interventions requiring biliary dilatation, yet all patients with the UF or CO type had a good prognosis. Among the patients with the BM type, 3 patients (14.3%) died or underwent retransplantation due to biliary complications, and 7 (33.3%) required repeated interventions for >1 year without improvement. Moreover, among 5 patients classified as the DN type, 1 (20%) died of biliary sepsis, 2 (40%) underwent retransplantation, and the remaining 2 (40%) did not recover from persistent jaundice and life-threatening cholangitis despite multiple interventions. In conclusion, all patients classified as UF or CO had a good outcome with or without additional interventions. However, all patients with the DN type and about half the patients with the BM type did not recover from life-threatening complications, despite repeated aggressive interventions; early retransplantation was therefore the only treatment option for these patients.

Management of biliary complications following orthotopic liver transplantation

Biliary complications are a major cause of morbidity following orthotopic liver transplantation with an overall incidence between 11% and 25%. The most common complications are biliary leaks, strictures, and stones. These complications have an impact on graft survival, length of hospital stay, recovery, and overall cost of care. Therefore, knowledge of these complications and their management is important to the practicing gastroenterologist. Historically, biliary complications after liver transplantation have been managed surgically. However, with the growth of therapeutic endoscopic and percutaneous radiologic methods, most of these complications can now be managed less invasively. This article focuses on the incidence, timing, mechanism, and endoscopic management of biliary leak, strictures, stones, sludge, casts, and sphincter of Oddi dysfunction following liver transplantation.

Outcomes and risk factors for failure of radiologic treatment of biliary strictures in pediatric liver transplantation recipients

Posttransplantation biliary strictures occur in 5-34% of the pediatric liver transplant patients and are conventionally managed by interventional radiological techniques. The aim of this manuscript is to assess the outcomes of patients with biliary strictures treated by percutaneous dilatation at our institution. Included in the study were 35 children with posttransplant biliary strictures that were treated with percutaneous dilatation and stenting. Initial dilation and biliary stent placement was accomplished in all patients without complications requiring surgical intervention. Recurrent strictures developed in 23 (66%) of 35 patients. The recurrence rate was 45% for anastomotic strictures, 90% for intrahepatic strictures, and 100% for those with both an anastomotic and intrahepatic component. Seven patients required revision of the choledochojejunostomy, 5 of them with a successful outcome and 2 requiring retransplant. Five patients were treated with retransplantation without surgical revision. Patients with an intrahepatic or a "combined" stricture were less likely to have a successful outcome after radiologic treatment. In conclusion, the radiological treatment of biliary strictures with balloon dilation and stenting can be performed successfully with minimal complications avoiding the need for surgical correction in many cases.

Anastomotic biliary strictures after liver transplantation: causes and consequences

We retrospectively studied the prevalence, presentation, results of treatment, and graft and patient survival of grafts developing an anastomotic biliary stricture (AS) in 531 adult liver transplantations performed between 1979 and 2003. Clinical and laboratory information was obtained from the hospital files, and radiological studies were re-evaluated. Twenty-one possible risk factors for the development of AS (variables of donor, recipient, surgical procedure, and postoperative course) were analyzed in a univariate and stepwise multivariate model. Forty-seven grafts showed an anastomotic stricture: 42 in duct-to-duct anastomoses, and 5 in hepaticojejunal Roux-en-Y anastomoses. The cumulative risk of AS after 1, 5, and 10 years was 6.6%, 10.6%, and 12.3% respectively. Postoperative bile leakage (P = 0.001), a female donor/male recipient combination (P = 0.010), and the era of transplantation (P = 0.006) were independent risk factors for the development of an AS. In 47% of cases, additional (radiologically minor) nonanastomotic strictures were diagnosed. All patients were successfully treated by 1 or more treatment modalities. As primary treatment, endoscopic retrograde cholangiopancreaticography (ERCP) was successful in 24 of 36 (67%) cases and percutaneous transhepatic cholangiodrainage in 4 of 11 (36%). In the end 15 patients (32%) were operated, all with long-term success. AS presenting more than 6 months after transplantation needed more episodes of stenting by ERCP, and more stents per episode compared to those presenting within 6 months and recurred more often. Graft and patient survival were not impaired by AS.

Presence of multiple bile ducts in the liver graft increases the incidence of biliary complications in pediatric liver transplantation

We studied the impact of multiple bile duct anastomosis on the development of biliary complications after liver transplantation in children. A total of 101 patients received a primary liver transplant and were divided into 2 groups: those with a single bile duct (n = 77) and those with multiple bile ducts (n = 24). Mean follow-up was 39.8 +/- 20.8 months. A total of 27 patients presented with biliary complications (26.7%), 18 patients (18.7%) presented with early complications (12 leaks and 6 strictures), and 9 patients (8.9%) had late strictures. Hepatic artery thrombosis (HAT) and multiple bile ducts were significant risk factors for the development of biliary complications, and the presence of multiple bile ducts was an independent risk factor. Patients with multiple bile ducts had a significantly greater incidence of total biliary complications compared to those with single ducts. Patients with multiple ducts had a higher incidence of leaks when compared to those in the single duct group, but the incidence of strictures, both early and late, was similar in both groups. One-year patient and graft survivals were not statistically different in the 2 groups. In conclusion, the presence of more than one bile duct in the graft is an independent risk factor for the development of biliary complications after pediatric liver transplantation.

Simultaneous surgical and interventional radiological approach to treat complicated biliary strictures after pediatric liver transplantation

Post-transplantation biliary strictures occur in 5-15% of the pediatric liver transplant patients and are conventionally managed by interventional radiological techniques. Failure of this treatment leads to reoperation and sometimes to retransplantation. Herein, we describe a surgical approach and interventional radiologic approach to manage biliary strictures that failed the conventional radiologic treatment, in order to avoid retransplantation. Included in the study were eight children who underwent liver transplantation at our center or referred to our institution for evaluation of the biliary strictures that failed radiological treatment. Biliary strictures were confirmed by a narrowing of the biliary anastomosis on the percutaneous transhepatic cholangiogram. At surgery, a guide wire was introduced into the distal bile system through the use of an enterotomy in Roux limb. Over the guide wire, the stricture was ballooned and the diameter of the biliary tree was determined. A pigtail catheter was introduced on the biliary tree across the abdominal wall, the liver, the stricture and the anastomosis into the enterotomy. A final cholangiogram confirmed the positioning of the catheter. Mean follow-up was 39.8 +/- 20.8 months. All patients had their strictures successfully treated and survived the procedure. Three patients were readmitted to the hospital with fever. It was necessary to revise the hepaticojejunostomy in three patients because of cholangitis and/or recurrence of biliary stricture. Of the eight patients of this study, two required retransplantation and one died. We conclude that an aggressive combined surgical and radiologic approach can avoid retransplantation in patients with complicated post-transplant biliary strictures.