Abstract
A 40-year old male was admitted to our hospital with a sudden onset of bloody stool after obstinate constipation. An emergency colonoscopy revealed a exfoliation of the mucosa, and an irregularly shaped ulceration with sharp demarcation of the margins in the sigmoid colon. A biopsy taken from the lesion revealed foreign materials that appeared to be fecal origin in the mucosa. Thus, the patient was diagnosed as having stercoral ulcer. Treatment with normalization of the bowel habit, and intravenous hyperalimentation resulted in healing of the ulcer in three weeks. Stercoral ulcer is a rare disease and have reported only thirty-eight cases, including the present case in Japan.