The origin of Klatskin tumors is from
The tumours arising at the confluence of right and left hepatic ducts at the liver hilus are called Klatskin tumours. These tumours are notable for their slow growing behaviour, marked sclerosing characteristics, and infrequent occurrence of distal metastasis.
Liver
Gall bladder
Confluence of cystic duct and hepatic duct
Confluence of right and left hepatic ducts