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. 2018 Aug 24;12:227. doi: 10.1186/s13256-018-1775-z

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© The Author(s). 2018

Open Access This 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 — Resected specimen by endoscopic submucosal dissection. This specimen shows neuroendocrine cell carcinoma arranged in a sheet fashion with mixed squamous cell carcinoma. Neuroendocrine cell carcinoma formed a duct and it is surrounded by squamous cell carcinoma. a Hematoxylin and eosin staining. Immunohistochemical staining showing: b chromogranin A, c synaptophysin, d CD56, and e Ki-67. f The fixed resected specimen is mapped by yellow and red lines. Red lines squamous cell carcinoma, yellow lines neuroendocrine cell carcinoma