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type I
limited to the common hepatic duct, below the level of the confluence of the right and left hepatic ducts
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type II
involves the confluence of the right and left hepatic ducts
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type IIIa
type II and extends to involve the origin of the right hepatic duct (confluence of the right posterior and anterior sectoral ducts)
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type IIIb
type II and extends to involve the origin of the left hepatic duct (confluence of the 2nd, 3rd and 4th segmental ducts)
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type IV
extending to and involving the origins of both right and left hepatic ducts (i.e., combination of types IIIa and IIIb)
ormultifocal involvement
Case Discussion
Diagrammatic representation of the Bismuth-Corlette classification, used to describe cholangiocarcinoma and, historically, biliary injury and/or strictures. Biliary injuries are now more commonly classified using the Strasberg classification, which was developed after the advent of laparoscopic surgery.
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