Fig. 2: Immune cell density and distribution by tumor subtypes and PD-L1 status.

Pie charts depict the comparative immune cell (IC) composition in the stroma and tumor regions for breast cancer subtypes and stratified by PD-L1 status The CD4 + IC component is further differentiated according to FOXP3 status. A All cases. B Triple negative breast cancer. C Hormone receptor positive, HER2-negative breast cancer. D PD-L1 positive cases. TNBC triple negative breast cancer, HR + HER2-BC hormone receptor positive, HER2-negative breast cancer.