Congenital common bile duct web in association with hepatobiliary pancreatic ductal anomalies.

Congenital webs are extremely rare anomalies of the extrahepatic ductal system. As the vast majority of such cases are asymptomatic, detection is usually incidental during surgery for some other cause. In a young boy presenting with features of cholangitis, a congenital common bile duct web was discovered on T-tube cholangiogram. Further anomalies of the intrahepatic and pancreatic ductal systems were also detected. Since all known causes of acquired web formation were excluded, a congenital origin of the web was assumed and the patient is continuing to do well after a follow-up of 22 months.