Dysplasia in ulcerative colitis.
D001706:Biopsy; D002471:Cell Transformation, Neoplastic; D003093:Colitis, Ulcerative / Q000150:complications / Q000473:pathology*; D003106:Colon / Q000601:surgery; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology*; D012007:Rectum / Q000601:surgery