Bismuth-Corlette classification is used to characterise hilar cholangiocarcinoma (Klatskin tumour). A tumour involving the right main hepatic duct and extending into the right anterior and right posterior sectoral ducts, with the left hepatic duct uninvolved, is classified as:

• A Type IIIB
• B Type II
• C Type IV
• D Type IIIA ✓

Explanation

Bismuth-Corlette classification: Type I — below confluence; Type II — involves confluence; Type IIIA — extends into right hepatic duct and its sectoral branches with the left duct free; Type IIIB — extends into left hepatic duct with the right duct free; Type IV — involves both right and left hepatic ducts. The described tumour (right main + right anterior/posterior sectoral ducts, left uninvolved) is Type IIIA. Type IIIA requires right hepatectomy + caudate lobe resection for curative intent. Type IIIB requires left hepatectomy + caudate lobe.

Reference: Bailey & Love's Short Practice of Surgery, 27th ed.

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Written and medically reviewed by the StethoPrep medical team.