Risk of malignant change in ulcerative colitis.
D000293:Adolescent; D000328:Adult; D002648:Child; D003093:Colitis, Ulcerative / Q000150:complications*; D003110:Colonic Neoplasms / Q000453:epidemiology* / Q000209:etiology* / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged