Fig. 3From: Prognostic significance of PD-L1-positive cancer-associated fibroblasts in patients with triple-negative breast cancerImmunohistochemical staining for PD-L1 (E1L3N) expression on cancer-associated fibroblasts (CAFs) in triple-negative breast cancer. PD-L1-positive CAFs (arrows). No PD-L1 expression is noted in the carcinoma cells (× 400)Back to article page