<prompt> Which pa of the intrahepatic bile duct is involved in Type 2 cholangiocarcinoma ?Division of both ducts and not extending outsideCommon hepatic duct onlySecondary hepatic ductsExtends beyond hilum  <response>: Cancers of the hepatic duct bifurcation have also been classified according to their anatomic location BISMUTHS CLASSIFICATION. In this system, Type I tumors are confined to the common hepatic duct. Type II tumors involve the bifurcation without involvement of secondary intrahepatic ducts. Type IIIa involves right secondary intrahepatic duct, Type IIIb involves left secondary hepatic duct. Type IV tumors involve the secondary intrahepatic ducts on both sides. 