Question:
According to the Bismuth–Corlette classification of hilar cholangiocarcinoma, involvement of the right hepatic duct corresponds to which type?
According to the Bismuth–Corlette classification of hilar cholangiocarcinoma, involvement of the right hepatic duct corresponds to which type?
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Bismuth-Corlette Memory Aid:
- Type IIIa involves the right side (usually requires Right Hepatectomy).
- Type IIIb involves the left side (usually requires Left Hepatectomy).
- Type IIIa involves the right side (usually requires Right Hepatectomy).
- Type IIIb involves the left side (usually requires Left Hepatectomy).
Updated On: Sep 3, 2026
- IIIa
- IIIb
- II
- IVa
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The Correct Option is A
Solution and Explanation
Concept:
The Bismuth-Corlette system classifies hilar cholangiocarcinomas (Klatskin tumors) based on the extent of their longitudinal spread along the biliary tree, which dictates resectability and surgical approach.
Explanation:
• Type I: The tumor is confined to the common hepatic duct, strictly below the main right-left biliary confluence.
• Type II: The tumor involves the main biliary confluence (the junction of the right and left hepatic ducts) but does not extend into the secondary intrahepatic confluences.
• Type IIIa: The tumor occludes the main confluence and extends proximally to involve the right secondary hepatic duct confluence (anterior and posterior sectoral ducts).
• Type IIIb: The tumor occludes the main confluence and extends proximally to involve the left secondary hepatic duct confluence.
• Type IV: The tumor extends bilaterally to involve both the right and left secondary confluences, or it is multicentric.
Final Answer:
A hilar cholangiocarcinoma extending into and involving the right secondary hepatic duct is classified as a Bismuth-Corlette Type IIIa tumor.
The Bismuth-Corlette system classifies hilar cholangiocarcinomas (Klatskin tumors) based on the extent of their longitudinal spread along the biliary tree, which dictates resectability and surgical approach.
Explanation:
• Type I: The tumor is confined to the common hepatic duct, strictly below the main right-left biliary confluence.
• Type II: The tumor involves the main biliary confluence (the junction of the right and left hepatic ducts) but does not extend into the secondary intrahepatic confluences.
• Type IIIa: The tumor occludes the main confluence and extends proximally to involve the right secondary hepatic duct confluence (anterior and posterior sectoral ducts).
• Type IIIb: The tumor occludes the main confluence and extends proximally to involve the left secondary hepatic duct confluence.
• Type IV: The tumor extends bilaterally to involve both the right and left secondary confluences, or it is multicentric.
Final Answer:
A hilar cholangiocarcinoma extending into and involving the right secondary hepatic duct is classified as a Bismuth-Corlette Type IIIa tumor.
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