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. 2019 Oct 2;25(2):e291–e301. doi: 10.1634/theoncologist.2019-0148

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© 2019 The Authors. The Oncologist published by Wiley Periodicals, Inc. on behalf of AlphaMed Press.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Photomicrographs showing immunohistochemistry staining of the programmed death‐ligand 1 (PD‐L1) expression of tumor cells and tumor‐infiltrating lymphocytes (TILs) in vaginal melanoma samples. The percentage of PD‐L1 expression in tumor cells was 0% (A), 3% (B and C), 20% (D), and 30% (E). PD‐L1‐positive staining in TILs was indicated by arrows (F).