Solitary gastric Peutz-Jeghers type stomach polyp mimicking a malignant gastric tumor

Figure 1 Image findings of gastric Peutz-Jeghers type stomach polyp. A: Abdominal computed tomography scans of the patient revealing a thickened gastric wall over the antrum of the stomach (arrow); B: Gastroendoscopy revealing a bulging lesion (4 cm × 3 cm) of the antrum (arrow); C: The bulging lesion displayed a central hole (arrow); D: Endoscopic ultrasonography demonstrating that the appearance of a lesion was due to a thickened subepithelial layer (second layer lesion), submucosal layer thickened (third layer, green arrow), and corresponding hole (red arrow) over the antrum of the stomach.

Figure 2 Pathological findings of gastric Peutz-Jeghers type stomach polyp. A: Gross examination of a stomach specimen from the patient showed a polyp-like lesion (4 cm × 3 cm) over the antrum following endoscopic mucosectomy; B: Immunohistochemical stains of smooth muscle actin in the mucosal layer revealed a proliferation of smooth muscle bundles (× 200); C: Submucosal layer of the lesion revealed a proliferation of smooth muscle bundles (× 200); D: Photomicrogram demonstrating the presence of an ectopic pancreas in the submucosa of the jejunum and of pancreatic ducts, acini and islet cells (hematoxylin and eosine staining, original magnification × 200).