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PD1 protein and mRNA staining in triple negative breast cancer. (A) RNAscope shows PD1 mRNA expression in TILs (400x). (B) IHC shows PD1 protein expression in the same case as in A (200x). (C) RNAscope shows negative PD1 mRNA expression in TILs (400x). (D) IHC shows PD1 protein expression in the same case as in C (200x).
