Abstract
A 78-year-old man admitted to our hospital because of persisting fever and general fatigue had a palpable fist-sized tumor in the right lower quadrant of abdomen. An abdominal CT scan showed a 7cm-sized clearly demarcated tumor with a low density area in its inner part at the inside of the ascending colon. Colonoscopy revealed a submucosal tumor like lesion in the ascending colon, but no definite diagnosis was made. High fever, increased CRP level, and impaired hepatic function persisted and no symptomatic remission was gained by conservative therapy. Laparotomy was thus performed for diagnosis and treatment. Laparotomy disclosed a tumor about 7 cm in diameter within the ascending colon mesentery and ileocecal resection was performed. The histopathological diagnosis was undifferentiated pleomorphic sarcoma probably arisen from the mesentery. Adjuvant chemotherapy was not done. The patient has been free from recurrence as of one year and seven months after the operation.
Few cases of the disease have been reported and the characteristics have not been clarified as yet. Since complete resection of the tumor can carry a long-term prognosis for the patients, our efforts to perform radical operation and further accumulation of clinical cases would be critical.
