Fig. 4From: An immune stratification reveals a subset of PD-1/LAG-3 double-positive triple-negative breast cancersProgrammed cell death 1 (PD-1) and lymphocyte activation gene 3 (LAG-3) protein expression in triple-negative breast cancer (TNBC). Representative immunohistochemical staining of PD-1 and LAG-3 in serial sections of TNBC samples with high (a) and low (b) lymphocytic infiltration. Scale bars represent 50 μmBack to article page