title: Choledochal cyst.
abstract: The computed tomographic (CT) appearance of a choledochal cyst is reported. Although the appearance on the precontrast scan was highly suggestive of this diagnosis, the definitive was made on CT following the intravenous administration of a biliary contrast agent.
mesh_terms: D000293:Adolescent; D003137:Common Bile Duct Diseases / Q000000981:diagnostic imaging*; D003560:Cysts / Q000000981:diagnostic imaging*; D006801:Humans; D014057:Tomography, X-Ray Computed