Fig. 1

a, b and c Upper gastrointestinal endoscopy revealing a submucosal tumor at the lesser curvature of the esophagogastric junction. d and e Endoscopic ultrasonography revealed a round, low-echoic mass. f The enhanced computed tomography (CT) scan shows a mass abnormal enhancement, and the lesion is seen on the side of lesser curvature of gastric body (9.5 cm × 6.3 cm) at the esophagogastric junction