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Bismuth-Corlette classification

The Bismuth-Corlette classification is a classification system for perihilar cholangiocarcinomas, which is based on the extent of ductal infiltration.  

Please referer to the main article on cholangiocarcinoma for a full discussion of the condition.

  • type I
    • limited to the common hepatic duct, below the level of the confluence of the right and left hepatic ducts
  • type II
    • involves the confluence of the right and left hepatic ducts
  • type IIIa
    • type II + extends to the bifurcation of the right hepatic duct
  • type IIIb
    • type II + extends to the bifurcation of the left hepatic duct
  • type IV
    • extending to the bifurcations of both right and left hepatic ducts OR
    • multifocal involvement
  • type V
    • stricture at the junction of common bile duct and cystic duct

The classification system may be used both for cholangiocarcinoma and benign stricturesref

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