Operative cholangiography.
D014670:Ampulla of Vater / Q000000981:diagnostic imaging; D001660:Biliary Tract Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D002758:Cholangiography; D005705:Gallbladder Diseases / Q000601:surgery*; D042882:Gallstones / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans