title: Clinicoanatomical studies on the dorsal subsegmental bile duct of the right anterior superior segment of the human liver.
abstract: BACKGROUND
  The dorsal subsegmental intrahepatic bile duct in the right anterior superior segment (B8c) sometimes joins the posterior sectorial duct. In such cases it can be misidentified as the right posterior superior segmental duct (B7). However, there are no published studies on the confluent pattern of B8c.
  
  
  METHODS
  We studied B8c in the resected liver of 107 patients (65 with bile duct carcinoma and 42 with gallbladder carcinoma) who had undergone right hepatectomy or more extensive right-sided liver resection.
  
  
  RESULTS
  B8c was identified in all cases. It joined the right posterior sectorial duct or B7 in 18 cases (16.8%). In 12 cases B8c joined independently the posterior sectorial duct or B7. In 6 cases B8c joined the posterior sectorial duct after making the common duct with the lateral subsegmental duct in the anterior superior or anterior inferior segment (B8b or B5c).
  
  
  CONCLUSIONS
  B8c does not join the anterior sectorial bile duct in every sixth case.
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, 466-8550, Nagoya, Japan. jkamiya@gb3.so-net.ne.jp
authors.forename: Junichi
authors.initials: J
authors.lastname: Kamiya
authors.forename: Masato
authors.initials: M
authors.lastname: Nagino
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Uesaka
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Sano
authors.forename: Yuji
authors.initials: Y
authors.lastname: Nimura
mesh_terms: D000368:Aged; D001653:Bile Ducts, Intrahepatic / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged