title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 28-2000. A 34-year-old man with ulcerative colitis and a large perirectal mass.
mesh_terms: D000230:Adenocarcinoma / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D000328:Adult; D018278:Carcinoma, Neuroendocrine / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D003093:Colitis, Ulcerative / Q000150:complications; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D010146:Pain / Q000209:etiology; D011859:Radiography; D012002:Rectal Diseases / Q000000981:diagnostic imaging / Q000209:etiology; D012004:Rectal Neoplasms / Q000150:complications / Q000473:pathology*; D012007:Rectum / Q000000981:diagnostic imaging / Q000473:pathology*