[Gastrointestinal stromal sarcoma. Report of a case and review of the literature].

The present report describes a case of a 27 year old patient with epigastric pain of moderate intensity, accompanied by hiporexia, weight loss and melena who was hospitalized in August 1.994 after 17 days of these signs and symptoms. Colonoscopy revelead a 6 cms polypoid, ulcerated lesion in the hepatic angle of the colon. At surgery, a 5 x 5 cms tumoral lesional 1.5 cms from the Treitz adhered to the small bowel was found. The gross findings of the specimen revealed an exophitic ulcerated tumor that measured 10 x 10 x 9 cms. Satellite nodules up to 2 cms in diameter were seen in contact with the large bowel mucosae. Light microscopy, immunohistochemical and ultrastructural studies, indicated a diagnosis of PLEXOSARCOMA.