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Colo-colonic intussusception secondary to a colonic lipoma : report of two cases.

Lipomas are the most common mesenchymal benign tumor of the colon. They are usually asymptomatic but may cause bleeding, obstruction, intussusception, or abdominal pain. A lead-point for adult intussusception exists in 90% of cases and is frequently malignant. The diagnosis can be made by colonoscopy, barium enema examination, and by computed tomography. We have reported two cases of submucosal lipoma of the ascending colon with intestinal obstruction. At laparotomy there was an intussusception of ascending colon, and right colectomy was performed.