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. 2020 Nov 26;8(22):5690–5700. doi: 10.12998/wjcc.v8.i22.5690

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©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Case 2 Steps of submucosal tunneling endoscopic resection. A: Endoscopic ultrasound showed the lesion arose from the muscular layer and was misdiagnosed as leiomyoma. The blood flow was not obvious, and the lesion was near the aorta; B: The submucosal tumor located in the middle of the thoracic esophagus; C: A submucosal tunnel was created; D: The tumor was dissected from the muscular layer in the submucosal tunnel; E: Closure of the submucosal tunnel with clips; F: The excised lesion.