The features of PD-l1 expression in tumor stromal cells, peritumoral microvessels and isolated clusters of tumor cells in breast cancer tissue and their correlation with clinical and morphological characteristics of breast cancer

Objective: to study the features of PD-L1 expression in tumor stromal cells, peritumoral microvessels, and isolated clusters of tumor cells in breast cancer (BC) tissue and their correlation with the clinical and morphological characteristics of BC. Material and Methods. The study included 158 patients with newly diagnosed invasive BC. PD-L1 expression was studied by immunohistochemistry. Statistical analysis was performed using Statistica 12.0 software.