Primary amyloidosis of the rectum.
D000368:Aged; D000686:Amyloidosis / Q000175:diagnosis / Q000473:pathology; D001344:Autopsy; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D008297:Male; D012002:Rectal Diseases / Q000175:diagnosis / Q000473:pathology; D014456:Ulcer / Q000209:etiology