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. 2015 May 12;13:182. doi: 10.1186/s12957-015-0600-z

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© Ma et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Pathologic results. (a) Pathology slice (hematoxylin-eosin stain, original magnification ×100) of the tumor. Nests of intermediate-grade tumor cells with intervening stroma can be seen. The tumor cells show clear to eosinophilic cytoplasm, with no obvious pigment. (b) Higher magnification (hematoxylin-eosin stain, original magnification ×400) of the tumor, showing prominent nuclear mitosis and atypia. (c) Higher magnification (original magnification ×400) of the tumor, showing HMB45 positive. (d) Higher magnification (original magnification ×400) of the tumor, showing S-100 positive. (e) Higher magnification (original magnification ×400) of the tumor, showing Vimentin-positive. (f) Higher magnification (original magnification ×400) of the tumor, showing Ki-67 index, was 20% to 30%.