Bismuth-Corlette classification

Last revised by Rohit Sharma on 8 Mar 2024

The Bismuth-Corlette classification is a classification system for perihilar cholangiocarcinomas, which is based on the extent of ductal infiltration 1,2.  

Classification

  • 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 and extends to involve the origin of the right hepatic duct (confluence of the right posterior and anterior sectoral ducts)

  • type IIIb

    • type II and extends to involve the origin of the left hepatic duct (confluence of the 2nd, 3rd and 4th segmental ducts)

  • type IV

    • extending to and involving the origins of both right and left hepatic ducts (i.e., combination of types IIIa and IIIb)
      or

    • multifocal involvement

  • type V

The classification system may be used both for cholangiocarcinoma and benign strictures ref required

See also

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