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Endoscopic submucosal tunnel dissection salvage technique. Endoscopic images showing; A: Marking of the surrounding the early gastric cancer (EGC) lesion and tunnel gate; B: Submucosal injection and incision of the tunnel gate; C: Initiation of tunnel dissection from tunnel gate; D: Tunnel dissection with hook knife and an endoscopic submucosal dissection cap; E: Direct dissection of EGC; F: En bloc resection.
