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. 2019 Nov 26;19:144. doi: 10.1186/s12905-019-0841-z

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© The Author(s). 2019

Open Access This 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 — Vaginal biopsy at 6 months. a Well-structured, mature squamous epithelium (haematoxylin-eosin [H-E], × 40) in c4. b Intense staining for cytokeratin AE1-AE3 (CKAE1-AE3) on the surface of the fragment, which helps in recognizing the epithelium at that level and with greater magnification to see the epithelial positivity to cytokeratins (CKAE1-AE3, × 200). c Among abundant inflammatory polymorphic cells, the presence of keratin sheets (dyed more homogeneous pink) can be estimated. With greater magnification, the keratin sheets are more evident (H-E, × 400)