Figure 2.

This is a representation of the step-by-step approach using STER for the removal of a submucosal lesion. (A) The submucosal lesion is identified in the fundus of the stomach; (B) a submucosal injection was completed to create a submucosal fluid cushion to aid in the incision; (C) an incision was made proximal to the submucosal lesion; (D) the scope was inserted into the proximal incision as the submucosal and muscular layers were separated using methylene blue to better differentiate the layers; (E) the lesion was resected using a snare; (F) the defect following mucosotomy was closed using the placement of clips. STER, submucosal tunneling endoscopic resection.