bile duct neoplasm (MONDO_0021662) is a benign or malignant neoplasm that affects the intrahepatic or extrahepatic bile ducts. Representative examples of benign neoplasms include bile duct adenoma and extrahepatic bile duct lipoma. Representative examples of malignant neoplasms include intrahepatic and extrahepatic cholangiocarcinoma. Also known as: bile duct neoplasm (disease), bile duct tumor, bile duct tumour, intrahepatic and extrahepatic bile duct neoplasm, intrahepatic and extrahepatic bile duct tumor, intrahepatic and extrahepatic bile duct tumour, neoplasm of bile duct, tumor of bile duct.