title: A report of 5 cases of cystic bile duct carcinoma of the liver and proposal of a new classification.
abstract: Primary biliary cystadenocarcinoma of the liver is rare. Among 239 patients with primary liver cancer admitted to our service during the last 13 years, there were 5 cases of cystic bile duct carcinoma of the liver. Three of these were cystadenocarcinoma, one was adenocarcinoma arising from a liver cyst, and one was carcinoma of the intrahepatic bile ducts with cystic dilatation. A better classification of these entities seems necessary, and it is suggested that malignant cystic tumors of the liver should be divided into 3 groups: Group A is cystic adenocarcinoma, group B is bile duct carcinoma with primary or secondary intrahepatic bile duct, and group C is degenerative cyst formation by other types of malignant tumors. Cystic adenocarcinoma (Group A) can then be further subdivided into cystadenocarcinoma, cystadenocarcinoma with cystadenoma, and carcinoma in a simple cyst of the liver.
authors.affiliation: First Department of Surgery Mie University School of Medicine, Tsu, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kawarada
authors.forename: H
authors.initials: H
authors.lastname: Taoka
authors.forename: R
authors.initials: R
authors.lastname: Mizumoto
mesh_terms: D002759:Adenoma, Bile Duct / Q000145:classification* / Q000453:epidemiology; D000368:Aged; D001650:Bile Duct Neoplasms / Q000145:classification* / Q000453:epidemiology; D001653:Bile Ducts, Intrahepatic / Q000473:pathology*; D003536:Cystadenocarcinoma / Q000145:classification* / Q000453:epidemiology; D005260:Female; D006801:Humans; D008099:Liver / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009626:Terminology as Topic