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. Author manuscript; available in PMC: 2018 Oct 8.
Published in final edited form as: Clin Cancer Res. 2017 Apr 20;23(16):4938–4944. doi: 10.1158/1078-0432.CCR-16-1821

Figure 1. Representative photomicrographs of PD-L1 immunohistochemistry performed on a cutaneous melanoma metastasis using clones 5H1, SP142, 28-8, SP263, and 22C3.

Figure 1.

All five antibodies showed similar regional patterns of PD-L1 expression by tumor cells, macrophages, and lymphocytes. A degree of geographic heterogeneity between the different tissue sections is evident. Qualitative differences in staining with regard to cytoplasmic or membranous staining or non-specific background staining were not observed. Original magnification, 200x, all fields.