<prompt> Most common site of cholangiocarcinoma?Distal biliary ductHilumIntrahepatic ductMultifocal  <response>: Most common site for cholangiocarcinoma is perihilar region65.Distal pa of duct constitutes 25 Intrahepatic pa constitutes around 10. Reference:SRBs manual of surgery,5th edition,page no:661. 