Structure of bile duct includes intrahepatic and extrahepatic bile duct, while bile duct cancer can be found in anywhere of the bile duct and can be defined according to the location it has been discovered as below:

• Intrahepatic cholangiocarcinoma
• Extrahepatic cholangiocarcinoma
• Hilar cholangiocarcinoma (Occurs at the junction of extra hepatic bile duct and liver)
• Klatskin Tumour (Occurs at the junction of left and right hepatic bile duct)

The symptoms of bile duct cancer are as well depended on the location of cancer. Commonly seen symptoms include yellowing, stool become pale in color, urine become deep in color, abdominal or back pain, unknown reason weight loss and no feeling of hunger. Fever may occur due to cholangitis, which is a result of cancerous obstruction.