Type 4 Bismuth classification for cholangiocarcinoma:
Ans. (c) Bifurcation and bilateral secondary intrahepatic ductsRef: Sabiston 20th edition Page 1517As per Bismuth Corelette Classification:* Type 4 is involvement of Bilateral 2nd order Bile ducts.
Common hepatic duct
Bifurcation only
Bifurcation and bilateral secondary intrahepatic ducts
Bifurcation and unilateral secondary intrahepatic ducts
Gall Bladder & Bile Ducts