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. 2022 May 3;9:874213. doi: 10.3389/fmed.2022.874213

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Copyright © 2022 Montella, Sabetta, Ronchi, De Sio, Arcaniolo, De Vita, Tirino, Caputo, D’Antonio, Fiorentino, Facchini, Lauro, Perdonà, Ventriglia, Aquino, Feroce, Borges Dos Reis, Neder, Brunelli, Franco and Zito Marino.

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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Representative results of PD-L1 (clone SP263) IHC expression by TPS in penile SCC. (A,E,I) Hematoxylin and Eosin (H&E) staining (20x magnification, scale bar 100 μm); (C,G,M) Hematoxylin and Eosin (H&E) staining (40x magnification, scale bar = 200 μm); (B,D) PD-L1 (clone SP263) IHC expression < 1%, DAB staining (40x magnification, scale bar = 200 μm); (F,H) PD-L1 (clone SP263) IHC expression 1% ≤ score < 50%, DAB staining (40x magnification, scale bar = 200μm); (L,N) PD-L1 (clone SP263) IHC expression ≥ 50%, DAB staining (40x magnification, scale bar = 200 μm).