Underwater endoscopic submucosal dissection effectively treats circumferential early-stage esophageal cancer recurring at the scar left by a prior endoscopic submucosal dissection

tissue scarring).b Scar formation at the site 29-31 cm from the incisors after the previous ESD of the lesion.ESD, endoscopic submucosal dissection. Fig. 2 a Clip traction could not well expose the submucosa and the cutting line.b Under the action of the buoyancy of water, the cutting line in the submucosa was fully exposed.c The submucosal dissection was carried out smoothly.d After the operation, the wound was intact and smooth, and no adverse events such as muscular layer injury occurred.