Fig. 4

A. Submucosal tumor at the junction of the gastric fundic body under gastroscopy; B. Hypoechoic masses originating from the muscularis propria and with intraluminal growth under EUS; C. Tumor section size under EUS: 0.91 cm*0.64 cm; D. Marking of the edge of tumor; E. Exposure of the tumor after C-shaped incision along the marks; F. Incision of the plasma membrane for an “artificial perforation”; G. Trauma after the perforation; H. Closure of trauma by titanium clip; I. The complete dissection of the tumor; J-L. Histopathological diagram of mesenchymoma derived from the muscularis propria; CD117 was positively expressed in the tumor tissue. EUS, endoscopic ultrasound