Tubular duplication of the bowel. Use of technetium 99m pertechnetate in diagnosis

Preoperative identification of tubular duplication of the bowel is possible by the use of technetium 99m pertechnetate if gastric mucosa is present within the duplicated bowel. A case of a 4-year-old boy with abdominal pain is described. The scan showed diffuse activity which increased in step with gastric activity.