Tumor or cancer of the common bile duct including the ampulla of vater and the sphincter of oddi. The disease is Monarch Disease Ontology entry MONDO_0006709 (common bile duct neoplasm). Also known as: common bile duct neoplasm (disease), common bile duct tumor, common bile duct tumour, neoplasm of common bile duct, tumor of common bile duct, tumour of common bile duct.