title: A pathognomonic roentgenologic sign of regional ileitis (Crohn's disease).
mesh_terms: D003093:Colitis, Ulcerative / Q000000981:diagnostic imaging / Q000473:pathology; D003424:Crohn Disease / Q000000981:diagnostic imaging* / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology; D011859:Radiography