[Nonvisualization of gallbladder and cystic duct obstruction (author's transl)].
D001660:Biliary Tract Diseases / Q000000981:diagnostic imaging*; D002758:Cholangiography / Q000379:methods*; D002765:Cholecystography; D003135:Common Bile Duct / Q000000981:diagnostic imaging; D003251:Constriction, Pathologic; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged