Concordance of programmed death-ligand 1 expression assessments determined via two immunohistochemical tests and the polymerase chain reaction method

Figure 2 Assessment of tumor-infiltrating programmed cell death protein 1 ligand 1-positive and SP142+ immune cells. A: Programmed cell death protein 1 ligand 1-positive (PDCD1 LG1+) immune cell (IC) score < 10%; B: PDCD1 LG1+ IC score ≥ 10%; C: SP142 IC score < 1%; D: SP142+ IC score ≥ 1%. Staining with anti-PDCD1 LG1 antibodies (A and B), 200 ×; staining with anti-programmed death-ligand 1 antibodies (clone SP142)(C and D), 200 ×.