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. 2021 Oct 12;8:744032. doi: 10.3389/fvets.2021.744032

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Copyright © 2021 Mei, Xin, Liu, Lin, Xian, Zhang, Hu, Xia, Wang and Lyu.

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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Immunohistochemical staining of the primary carcinoma sections (400X). The dark brown color was observed as positive staining. Tissues from the primary cancer were negative for ER (A), PR (B) and HER-2 (C), and were positive for P63 (D), CK5/6 (E), and α-SMA (F) localized in the cell membrane.