Cytoplasmic and nuclear programmed death ligand 1 expression in peritumoral stromal cells in breast cancer: Prognostic and predictive value

Figure 1 Assessment of the programmed cell death protein 1 ligand 1-positive LF score. A: Relative density of immune cells (ICs) – 2; percentage of programmed cell death protein 1 ligand 1-positive (PDCD1 LG1+) ICs - 1. PDCD1 LG1+ LF score = 2 (1 × 2); B: Relative density of ICs - 2; percentage of PDCD1 LG1+ ICs - 1. PDCD1 LG1+ LF score = 2 (2 × 1); C: Relative density of ICs - 3; percentage of PDCD1 LG1+ ICs - 2. The PDCD1 LG1+ LF score = 6 (3 × 2); D: Relative density of ICs - 3; percentage of PDCD1 LG1+ ICs - 4. PDCD1 LG1+ LF score = 12 (3 × 4). Immunohistochemistry staining with antibodies against PDCD1 LG1, 800 ×.