A constant bile duct anomaly encountered during biliary operation.
D000328:Adult; D001652:Bile Ducts / Q000002:abnormalities*; D001662:Biliary Tract Surgical Procedures; D002404:Catheterization; D002758:Cholangiography; D002763:Cholecystectomy; D002765:Cholecystography; D003135:Common Bile Duct / Q000000981:diagnostic imaging; D003549:Cystic Duct / Q000002:abnormalities / Q000601:surgery; D004322:Drainage; D005260:Female; D006500:Hepatic Duct, Common / Q000000981:diagnostic imaging; D006801:Humans; D008026:Ligation; D008297:Male; D008875:Middle Aged