Tubular Intestinal Duplication Harboring Gastric Ectopia Accurately Diagnosed by Tc-99m Pertechnetate Single-photon Emission Computed Tomography/Computed Tomography Meckel's Scan.

A 7-year-old girl with an episode of hematochezia and melena, suspicious for bleeding Meckel's diverticulum, was referred for a Tc-99m pertechnetate Meckel's scan. On dynamic planar scan, apart from prompt gastric visualization an oval-shaped, area of inhomogeneous tracer uptake was observed in the left lower quadrant of the abdomen. Subsequent single-photon emission computed tomography/computed tomography localized this to intestinal lumen, thus establishing the diagnosis of intestinal duplication (ID) with functional gastric mucosa. Surgical exploration confirmed the presence of a tubular ID in a distance of 1.5 m from the ileocecal valve and pathologic examination showed gastric mucosa lining the lumen of the duplication.