What are the main surgical procedures for extra‑hepatic biliary diseases?

Surgical Procedures on Bile Ducts

Overview of Main Surgical Procedures

The primary surgical procedures for extrahepatic biliary diseases include Roux-en-Y hepaticojejunostomy for bile duct injuries and strictures, choledochoduodenostomy for distal bile duct pathology, extrahepatic bile duct resection with biliary reconstruction, and biliary bypass procedures for dominant strictures. 1

Bile Duct Injury Repair

Definitive Repair Procedures

Surgery remains the mainstay of treatment for bile duct injury (BDI) and traumatic bile duct stricture. 1 The definitive repair involves:

• Exposing the proximal and distal bile duct to assess the extent of injury 1
• Anastomotic bile duct tissue preparation using only healthy, non-ischemic, non-inflamed, and non-scarred bile duct tissue 2, 3
• Removing scar tissue from bile duct stumps after full exposure of the proximal bile duct 2, 3
• Performing minimally invasive tissue anastomoses using fine suture technique (5-0 or 6-0) based on bile duct wall thickness 2, 3

Roux-en-Y Hepaticojejunostomy

For complete loss of bile duct continuity or major injuries with tissue loss, Roux-en-Y hepaticojejunostomy is the treatment of choice with success rates of 80-90% when performed by experienced surgeons. 2, 4

• The procedure involves creating an anastomosis between healthy bile duct tissue and a Roux-en-Y jejunal limb 4
• For cases where left and right hepatic ducts are transected, scar tissue must be removed from bile duct stumps and an anastomotic stoma formed by suturing the medial margins of left and right hepatic ducts before performing anastomosis with the jejunum 4
• Principles include single-layer stitching, uniform margins, appropriate density, moderate knotting strength, and tension-free anastomosis 4

Management of Dominant Strictures

Surgical Approaches for Primary Sclerosing Cholangitis

Non-transplant surgical approaches for dominant strictures include biliary bypass by cholangio-enterostomy or resection of the extrahepatic biliary stricture with Roux-en-Y hepaticojejunostomy. 1

• Biliary bypass alone is employed infrequently because dominant strictures are typically hilar, and intrahepatic ducts are variably involved which limits access and quality for bypass 1
• Biliary bypass has no role in PSC patients with cirrhosis 1
• Extrahepatic bile duct resection with Roux-en-Y hepaticojejunostomy in selected non-cirrhotic PSC patients achieves overall survival of 83% at 5 years and 60% at 10 years 1
• Bilirubin levels ≥ 2 mg/dL and cirrhosis are associated with decreased survival 1

Endoscopic vs. Surgical Management

While endoscopic balloon dilatation is effective for dominant strictures, biliary stenting should be reserved for strictures refractory to dilatation due to increased complications compared to dilatation alone. 1, 2

Procedures for Specific Bile Duct Pathologies

Intrahepatic Cholangiocarcinoma

Complete resection involving removal of the involved hepatic lobe or segment along the bile duct is the only potentially curative therapy, with 5-year survival rates ranging from 20% to 43%. 1

Extrahepatic Cholangiocarcinoma

Surgical procedures are based on the anatomical location of the lesion: 1

• Hilar resection with lymphadenectomy and en bloc liver resection (with caudate resection strongly encouraged) for lesions in the proximal third of the extrahepatic biliary tree 1
• Major bile duct excision with lymphadenectomy and frozen section assessment of bile duct margins for lesions in the mid third 1
• Pancreaticoduodenectomy with lymphadenectomy for lesions in the distal third of the extrahepatic biliary tree 1
• 5-year survival rates range from 20% to 40% for hilar cholangiocarcinoma and 37% for distal bile duct cancers 1

Congenital Bile Duct Cysts

Complete cyst excision with cholecystectomy followed by biliary reconstruction using Roux-en-Y hepaticojejunostomy is the treatment of choice for extrahepatic disease (type I and IV BDC). 5

• For type V BDC (Caroli's disease), the extent of liver resection is tailored to intrahepatic disease extent and considers the presence and severity of underlying congenital hepatic fibrosis and kidney disease 5
• Hepatic resection and liver transplantation are important options for diffuse forms of Todani type V cysts 6

Timing of Surgical Intervention

Immediate vs. Delayed Repair

Intraoperative bile duct injuries should be repaired immediately only by experienced biliary surgery specialists. 4, 3

• If specialist expertise is unavailable during initial surgery, patients should receive drainage and be referred to specialist centers 3
• For BDI detected early postoperatively without local inflammation, primary repair can be performed 3
• In cases with abdominal infection, biliary peritonitis, vascular injury, or other complications, delayed repair is recommended after controlling bile leakage and infection 3
• Current evidence supports definitive repair at 4-6 weeks after effective control of inflammation and infection 1, 3

Combined Surgical and Interventional Approaches

For complex benign biliary strictures, Roux-en-Y hepaticojejunostomy can be performed with an extended limb of jejunum brought to the abdominal wall to allow access for later radiological intervention. 7

• This multidisciplinary approach minimizes the need for repeated surgical interventions 7
• At mean follow-up of 16 months, this approach achieved excellent results in 41% of patients and good results in 35% of patients with complex strictures 7

Critical Technical Considerations

Fundamental Surgical Principles

Anastomosis must be built upon healthy, non-ischemic, non-inflamed, and non-scarred bile duct tissue. 2, 3

• Many repair failures occur due to failure to follow this principle, particularly when ischemic boundaries are unclear 3
• Using scarred bile duct wall or surrounding tissue will inevitably lead to surgical failure 3
• Repair should never be performed on ischemic or thermally injured bile duct tissue, as unclear margins of thermal injury are a primary cause of anastomotic leakage and stricture formation 3

Management of Associated Vascular Injuries

Complex vasculobiliary injuries should be delayed rather than attempted intraoperatively, even by expert hepatopancreatobiliary surgeons. 2, 4

• Systematic immediate repair of isolated right hepatic artery injuries is not recommended 2, 4
• The benefit/risk ratio should be carefully evaluated on a case-by-case basis for vascular injuries 4

Common Pitfalls and How to Avoid Them

The incidence of BDI associated with laparoscopic cholecystectomy (0.4-0.6%) is 2-3 times higher than open cholecystectomy (0.125-0.3%). 1

• Only 1/3-1/2 of BDI can be diagnosed in time, and more than 70% of BDI is initially repaired by surgeons who do not specialize in such repair surgery 1
• Non-definitive surgical exploration and implementation of definitive repair surgery with inappropriate timing are ubiquitous 1
• Delayed referral to a specialist center increases morbidity 1
• Even in high volume biliary surgery centers with extensive experience, the incidence of stricture after repair surgery of BDI still reaches 10-20% 1