Fig. 3
From: Dramatic response of metaplastic breast cancer to chemo-immunotherapy
Histopathologic features of the MPBC obtained by punch biopsy from peripheral chest wall lesion (inferolateral margin). a Baseline PD-L1 IHC stain at 20×. One-hundred percent of tumor cells stain positive for PD-L1 (95% at 3 + intensity, 5% at 2 + intensity), b Tumor H and E stain at 40× at baseline and c after treatment with pembrolizumab (biopsy cycle 3, day 1) with increase in TIL from baseline (10 to 30%)
