title: Etiology of choledochal cysts: two instructive cases.
abstract: The etiology of choledochal cysts is controversial. The authors report two cases which show that type 1 cysts (axial dilatation of the common bile duct and common hepatic duct) may be caused by a biliary web and that some choledochoceles (type 3 cyst) may actually be duodenal duplications (i.e., having an outer wall of smooth muscle lined with gastrointestinal mucosa and being adherent to the gut).
mesh_terms: D000328:Adult; D000368:Aged; D001649:Bile Duct Diseases / Q000209:etiology / Q000473:pathology / Q000601:surgery; D001652:Bile Ducts / Q000473:pathology / Q000601:surgery; D003137:Common Bile Duct Diseases / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D003560:Cysts / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D004378:Duodenal Diseases / Q000209:etiology; D004386:Duodenum / Q000473:pathology / Q000601:surgery; D005260:Female; D006500:Hepatic Duct, Common / Q000473:pathology / Q000601:surgery; D006801:Humans; D007443:Intussusception / Q000209:etiology