Question: A 48-year-old patient was referred for gastroscopy and colonoscopy because of anemia. Personal history was otherwise unremarkable except for Wolf-Parkinson-White syndrome. Gastroscopy showed a submucosal 2 × 4-cm tumor in the antrum with a central retraction (Figure A, endoscopic finding). On endosonography and MRI, a submucosal tumor was evident, confined to the antral wall, without invasion of the muscularis propria.