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. 2020 Feb 21;20:60. doi: 10.1186/s12886-020-1312-x

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© The Author(s). 2020

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. 3 — a Photomicrograph of the tumour section showing nests of large polygonal cells separated by thin fibrovascular septae (haematoxylin-eosin, original magnification × 200). b The cells are large, uniform, and epithelioid with fine, eosinophilic, granular cytoplasm and eccentrically located nuclei containing prominent nucleoli (haematoxylin-eosin, original magnification × 400). c PAS revealing characteristic diastase-resistant crystals that vary in size and shape within the cytoplasm of the tumour cells (PAS, original magnification × 400). d D-PAS-positive crystalline structures in tumour cells showing non-glycogen materials (D-PAS, original magnification × 400). e Ki67 immunostaining of tissue demonstrating strong nuclear immunoreactivity in some tumour cells (Ki67, original magnification × 400)