Comparison between Submucosal Tunneling Endoscopic Resection and Endoscopic Submucosal Dissection for Prepyloric Submucosal Tumors: A Case-Matched Controlled Study

Figure 1

The procedure of P-STER for prepyloric SMTs and the post-ESD wound involved the pylorus ring. (a) The diagram of P-STER for prepyloric SMTs. (b) The appearance of a prepyloric SMT under endoscopy. (c) Submucosal injection at the start site of submucosal tunnel. (d) An inverted T incision was made as the tunnel entrance. (e) Submucosal tunnel was created between the mucosal and muscularis propria (MP) layer. (f) The prepyloric SMT was found in the submucosal tunnel. (g): The basilar part of the prepyloric SMT was resected. (h) The appearance of the postoperative wound. (i) The entry was closed using metal clips. (j) The post-ESD wound involved the pylorus ring.

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