title: Problems in the differentiation of ulcerative colitis and Crohn's disease of the colon: the need for repeated diagnostic evaluation.
mesh_terms: D003093:Colitis, Ulcerative / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D003108:Colonic Diseases / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D003424:Crohn Disease / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D003937:Diagnosis, Differential; D011351:Proctoscopy; D012812:Sigmoidoscopy