Application of endoscopic submucosal dissection in duodenal space-occupying lesions

Figure 1 Endoscopic submucosal dissection was performed for a duodenal submucosal mass. The duodenal bulb showed a submucosal elevation approximately 12 mm in diameter, and pathology suggested a stromal tumor. A: Submucosal tumor on the anterior wall of the greater curvature of duodenum; B: Endoscopic ultrasonography showed that the lesion originated from the lamina propria; C: Mark the lesion boundary; D. The mucosa layer was incised circumferentiality; E: Resect the tumor; F: Muscular perforation; G: Cover the perforation with nylon rope and metal clips; H: Resected specimen for pathological examination.