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. 2017 Feb 13;17:127. doi: 10.1186/s12885-017-3127-6

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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. 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 — Histological appearance of benign and atypical meningioma. a Histological analysis of the posterior specimen revealed a grade I meningioma with typical whorl formations (bar 100 μm) and b psammoma bodies (bar 100 μm). c The anterior tumor revealed a grade II meningioma with increased cellularity, nuclear pleomorphism, and prominent nucleoli as indicated by H&E (bar 50 μm) and d an increased proliferation index by MIB-1 labeling (bar 50 μm)