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. 2019 Nov 21;20:262. doi: 10.1186/s12931-019-1236-2

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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. 1 — Representative CT and HE images of LELC and squamous carcinoma On CT scans, LELC usually presented a round-like well-defined mass/nodule (a); while squamous carcinoma was relatively larger with an irregular shape (b). For the histopathological examination with HE staining, a large island of nested tumor cells infiltrated by lymphocytes were found in LELC (c, ×200), whereas in squamous carcinoma, squamoid tumor cells were poorly-differentiated with abundant eosinophilic cytoplasm (d, ×200)