Strasberg Classification of Iatrogenic Bile Duct Injuries
The Strasberg classification divides bile duct injuries into five main types (A through E), with Type E further subdivided based on the level of injury to the main bile duct 1.
Classification Breakdown
Minor Injuries (Types A-D)
These injuries are not associated with tissue loss and can typically be managed conservatively or with endoscopic intervention 1:
- Type A: Bile leak from a minor duct (cystic duct or duct of Luschka) still in continuity with the biliary tree
- Type B: Occlusion of part of the biliary tree (usually an aberrant right hepatic duct)
- Type C: Bile leak from a duct not in communication with the common bile duct (transected aberrant right hepatic duct)
- Type D: Lateral injury to the extrahepatic bile duct (partial wall injury without complete transection)
Major Injuries (Type E)
Type E injuries involve the main bile duct with tissue loss and require complex reconstruction with Roux-en-Y hepaticojejunostomy 1:
- Type E1: Stricture of the common hepatic duct >2 cm from the bifurcation
- Type E2: Stricture of the common hepatic duct <2 cm from the bifurcation
- Type E3: Stricture at the hilum with preservation of the confluence
- Type E4: Destruction of the confluence with separation of the right and left hepatic ducts
- Type E5: Injury involving an aberrant right hepatic duct along with the common hepatic duct
Clinical Significance
The key distinction is between minor (A-D) and major (E) injuries, as this fundamentally changes management 1:
- Minor injuries: Can often be managed with percutaneous drainage and endoscopic sphincterotomy with stent placement
- Major injuries: Require surgical reconstruction with bilioenteric anastomosis, ideally at a specialized hepatobiliary center
Type E injuries are associated with tissue loss (e.g., the common bile duct is clipped and transected), distinguishing them from the partial injuries of Types A-D 1.
The classification helps predict outcomes and guide treatment algorithms, with higher-grade injuries (E3-E5) being independent predictors of repair failure 2.