NCIt definition : A non-neoplastic or neoplastic disorder that affects the intrahepatic or extrahepatic
bile ducts or the gallbladder. Representative examples of non-neoplastic disorders
include cholangitis and cholecystitis. Representative examples of neoplastic disorders
include extrahepatic bile duct adenoma, intrahepatic and extrahepatic cholangiocarcinoma,
and gallbladder carcinoma.;