Cystic dilatation of biliary tract: choledochal cyst.
D001660:Biliary Tract Diseases / Q000601:surgery*; D003135:Common Bile Duct / Q000601:surgery*; D003560:Cysts / Q000601:surgery*; D004108:Dilatation, Pathologic / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged