title: Extrinsic abnormalities affecting the biliary system.
mesh_terms: D001653:Bile Ducts, Intrahepatic / Q000033:anatomy & histology; D001660:Biliary Tract Diseases / Q000209:etiology*; D002758:Cholangiography; D003135:Common Bile Duct; D005260:Female; D005704:Gallbladder / Q000033:anatomy & histology; D005705:Gallbladder Diseases / Q000000981:diagnostic imaging; D006801:Humans; D008875:Middle Aged