Malignant lymphoma of over fifteen years' duration masquerading as ulcerative colitis.
D003093:Colitis, Ulcerative; D006801:Humans; D008223:Lymphoma; D016403:Lymphoma, Large B-Cell, Diffuse; D008228:Lymphoma, Non-Hodgkin; D011127:Polyps; D012509:Sarcoma
POLYPI; SARCOMA, RETICULUM CELL