Cholangiocarcinoma

Cholangiocarcinoma refers to a malignant tumor of the extrahepatic bile duct that originates from the left and right hepatic duct confluence to the lower end of the common bile duct. Cholangiocarcinoma can be divided into three types: hilar cholangiocarcinoma or upper cholangiocarcinoma, middle cholangiocarcinoma, and lower cholangiocarcinoma. Primary cholangiocarcinoma is rare, accounting for 0.01% to 0.46% of common autopsy, 2% of autopsy of tumor patients, and 0.3% to 1.8% of biliary tract surgery. Gallbladder cancer in Europe and the United States is 1.5 to 5 times that of cholangiocarcinoma. According to Japanese data, it is more than gallbladder cancer. The male to female ratio is approximately 1.5 to 3.0. The age of onset is mostly 50 to 70 years, but it can also be seen in young people.