MONDO_0018536 (adenocarcinoma of gallbladder and extrahepatic biliary tract) can be described as follows. Adenocarcinoma of the gallbladder and extrahepatic biliary tract is a rare epithelial carcinoma, arising either in the gallbladder itself or from the epithelium lining the extrahepatic biliary tree, cystic duct and/or peribiliary gland, characterized by nonspecific symptoms, such as abdominal pain, jaundice and vomiting and sometimes mimicking benign biliary diseases. Chronic biliary epithelial inflammation (e.g. primary sclerosing cholangitis, cholelithiasis, choledocholithiasis, liver fluke infestation) is a major risk factor. Also known as: adenocarcinoma of gallbladder and EBT, adenocarcinoma of the gallbladder and EBT, adenocarcinoma of the gallbladder and extrahepatic biliary tract.