Symptomatic colonic lipoma: differential diagnosis of large bowel tumors.

Symptomatic colonic lipomas, although unusual, continue to present difficulties in the preoperative differential diagnosis between malignant and benign colonic neoplasm. Although new imaging techniques are available, they are frequently diagnosed at laparotomy, and definitive histology is required. Local excision is adequate treatment, but segmental excision may be necessary when there is doubt about the diagnosis, or when a complication occurs.