(a)
(b)
(c)
(d)
Figure 1: Esophagogastroduodenoscopy (EGD) and endoscopic ultrasound (EUS) of the gastric mass. (a)-(b) EGD shows the 3.5 × 2.5 × 1.5 cm subepithelial gastric mass with central umbilication (blue arrow). (c)-(d) EUS shows the gastric mass is hypoechoic (blue arrow).