Gastrointestinal hemangiomatosis in children: demonstration with CT.

The presence of gastrointestinal (GI) tract hemangiomatosis was demonstrated by computed tomography in two children who presented with lower GI tract bleeding. Marked vascular enhancement of the bowel during rapid intravenous administration of contrast material and dynamic scanning is characteristic, similar to that seen with hemangiomas elsewhere in the body. Barium examinations demonstrate submucosal lesions within the bowel and are useful to approximate the length of bowel involvement.