The mucosa of the recto-sigmoid in ulcerative colitis.
D003092:Colitis; D003093:Colitis, Ulcerative / Q000473:pathology*; D012809:Colon, Sigmoid / Q000473:pathology*; D006801:Humans; D009092:Mucous Membrane; D012007:Rectum / Q000473:pathology*
COLITIS, ULCERATIVE/pathology; RECTUM/pathology; SIGMOID/pathology