Symposium. Crohn's disease: precancerous changes in colitis.
D001706:Biopsy; D002278:Carcinoma in Situ / Q000175:diagnosis; D002908:Chronic Disease; D003093:Colitis, Ulcerative / Q000473:pathology*; D003110:Colonic Neoplasms / Q000150:complications; D003424:Crohn Disease / Q000150:complications / Q000473:pathology*; D004848:Epithelium / Q000473:pathology; D006801:Humans; D011230:Precancerous Conditions; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000473:pathology