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. 2019 Apr 11;19:37. doi: 10.1186/s12893-019-0497-5

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — a A male patient was diagnosed with a postoperative anastomotic leak 7 days after Ivor-Lewis operation for esophageal cancer. The opening of the leak was estimated to be 2 cm in diameter. b A polyurethane sponge sutured to the tip of a nasogastric tube was inserted into the cavity of the anastomotic leak. c The cavity size decreased with granulation tissue and the fistula was closed after 16 days of endoscopic vacuum-assisted closure (EVAC) treatment. d The anastomotic leak was completely healed 31 days after treatment