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. 2017 May 10;3:66. doi: 10.1186/s40792-017-0342-y

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© The Author(s). 2017

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.

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Fig. 4 — Histological findings of tumors. a Histological specimen of liver tumor (hematoxylin and eosin (HE), ×200) shows epithelioid-type mesothelioma cells with tubular components. b Mesothelioma cells with cystic components (HE, ×200). c Immunohistochemical staining for calretinin shows positive tumor cells (×200). d Immunohistochemical staining for CEA shows negative tumor cells (×200). e Immunohistochemical staining for HepPer1 shows negative tumor cells (×200). f Immunohistochemical staining for Ki-67, a marker of tumor proliferation, shows positive tumor cells (brown nuclei indicated with black arrows). Ki-67 index is 5–6%