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. 2021 Apr 13;9(4):E606–E609. doi: 10.1055/a-1352-3805

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The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 3 — Endoscopic image of ESD with an ultrathin endoscope. a Endoscopic image of marking for a virtual lesion 15 mm in diameter. b Endoscopic image during submucosal dissection. c Endoscopic image after en bloc resection achieved without perforation.