Biopsy of the rectum in ulcerative colitis.
D001706:Biopsy; D003092:Colitis; D003093:Colitis, Ulcerative / Q000473:pathology*; D006801:Humans; D012007:Rectum / Q000473:pathology*
BIOPSY; COLITIS, ULCERATIVE/pathology; RECTUM/pathology