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. 2019 Jul 8;17:38. doi: 10.1186/s12969-019-0336-3

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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 — Microscopic evaluation of twin skin biopsies. At different magnification, microscopic evaluation of Haematoxylin&Eosin-stained paraffin sections of skin biopsies of both twins (a-c and b-d, respectively) reveals a parakeratotic cornified layer and epidermis with marked elongation of rete ridges and an almost absent granular layer (arrow heads); in the papillary dermis, inflammatory cells surround dilated tortuous small vessels, consistent with the diagnosis of psoriasis. Haematoxylin&Eosin stain; original magnification a, b: 40X; c, d: 100X