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. 2020 Oct 27;7:583874. doi: 10.3389/fvets.2020.583874

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Copyright © 2020 de Faria Lainetti, Brandi, Leis Filho, Prado, Kobayashi, Laufer-Amorim and Fonseca-Alves.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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CD31/periodic acid Schiff (PAS) double staining of the xenotransplant tumor. A group of neoplastic cells in a solid formation is shown. The arrows indicate PAS-positive endothelial-like structures formed by neoplastic cells. The highlighted area in the top shows a blood vessel double stained for CD31/PAS.