title: Angiography of colonic Crohn's disease: the zoning sign revisited.
abstract: The zoning sign can be demonstrated in 50% of angiographies in colonic Crohn's disease and provides a reliable differential diagnostic aid against ulcerative colitis. The composition of the sign has been enlarged by the recognition of a zone C. The application of angiography in the radiologic diagnosis of inflammatory disease of the colon is discussed.
mesh_terms: D000792:Angiography; D003106:Colon / Q000000981:diagnostic imaging*; D003424:Crohn Disease / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D006801:Humans