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. 2019 Jan 15;9:1. doi: 10.1186/s13569-018-0111-0

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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. 2 — A, C, and E (bladder wall tumor): A highly cellular epithelioid (top right) and spindle cell (bottom left) malignancy involving the outer wall of the urinary bladder (A) (H&E ×100). The cells demonstrate round to oval nuclei with variably prominent nucleoli, moderate eosinophilic cytoplasm and indistinct borders (C) (H&E ×400). Immunohistochemistry shows diffuse reactivity for cytokeratin AE1/AE3 and calretinin (inset) (E) (IHC ×100). B, D, and F (remote abdominal tumor): A moderately cellular malignancy with intermixed spindled and epithelioid cells involving the outer gastric wall (B) (H&E ×200). The cells demonstrate irregular nuclei with prominent multiple eosinophilic nucleoli, abundant eosinophilic cytoplasm and indistinct borders (D) (H&E ×400). Immunohistochemistry shows reactivity for cytokeratin AE1/AE3 and negative calretinin (inset) (F) (IHC ×100)