title: Unilocular extrahepatic biliary cystadenoma mimicking choledochal cyst: a case report.
abstract: We report here on a case of extrahepatic biliary cystadenoma arising from the common hepatic duct. A 42-year-old woman was evaluated by us to find the cause of her jaundice. Ultrasonography and CT showed a cystic dilatation of the common hepatic duct and also marked dilatation of the intrahepatic duct. Direct cholangiography demonstrated a large filling defect between the left hepatic duct and the common hepatic duct; dilatation of the intrahepatic duct was also demonstrated. Following excision of the cystic mass, it was pathologically confirmed as a unilocular biliary mucinous cystadenoma arising from the common hepatic duct.
authors.affiliation: Department of Diagnostic Radiology, Kyung Hee University Hospital, Dongdaemun-gu, Seoul, Korea.
authors.forename: Ju-Hyun
authors.initials: JH
authors.lastname: Park
authors.forename: Dong Ho
authors.initials: DH
authors.lastname: Lee
authors.forename: Hyoung Jung
authors.initials: HJ
authors.lastname: Kim
authors.forename: Young Tae
authors.initials: YT
authors.lastname: Ko
authors.forename: Joo Won
authors.initials: JW
authors.lastname: Lim
authors.forename: Moon-Ho
authors.initials: MH
authors.lastname: Yang
mesh_terms: D000328:Adult; D001650:Bile Duct Neoplasms / Q000175:diagnosis*; D049448:Cholangiopancreatography, Magnetic Resonance; D015529:Choledochal Cyst / Q000175:diagnosis*; D003537:Cystadenoma / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006500:Hepatic Duct, Common / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D014057:Tomography, X-Ray Computed; D018084:Ultrasonography, Interventional