title: The separate-lesion type combined hepatocellular carcinoma and cholangiocarcinoma.
abstract: The separate-lesion type of combined hepatocellular carcinoma and cholangiocarcinoma is particularly rare. We treated two such patients with hepatic resection after performing dynamic computed tomography. In case 1, a 64-year-old Japanese man with chronic hepatitis C underwent right hepatic lobectomy for two hepatic tumors; both tumors originally were thought to be hepatocellular carcinomas because both were hypervascular. However, histologic examination revealed that one tumor was hepatocellular carcinoma and another tumor was tubular adenocarcinoma. In case 2, a 73-year-old man, a second lesion was detected 8 months after transcatheter arterial embolization for hepatocellular carcinoma associated with chronic hepatitis C. The newer lesion in case 2 showed delayed enhancement by dynamic computed tomography. We diagnosed the lesion as cholangiocarcinoma and performed right hepatic lobectomy and dissection of lymph nodes in the hepatoduodenal ligament. Histologic examination confirmed that the new lesion was tubular adenocarcinoma. Case 1 and 2 respectively represent synchronous and metachronous occurrence of the separate-lesion variety of combined hepatic cancer.
authors.affiliation: Second Department of Surgery, Osaka City University Medical School, 1-4-3 Asahimachi, Abeno-ku, Osaka 545-8585, Japan. m2664791@msic.med.osaka-cu.ac.jp
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Hirohashi
authors.forename: Takahiro
authors.initials: T
authors.lastname: Uenishi
authors.forename: Shoji
authors.initials: S
authors.lastname: Kubo
authors.forename: Takatsugu
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Hiromu
authors.initials: H
authors.lastname: Tanaka
authors.forename: Taichi
authors.initials: T
authors.lastname: Shuto
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kinoshita
mesh_terms: D000368:Aged; D001650:Bile Duct Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D001653:Bile Ducts, Intrahepatic; D018281:Cholangiocarcinoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D016609:Neoplasms, Second Primary / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed