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

Figure 5 Frequencies of programmed death-ligand 1 expression in immune cells according to marker determination methods. A: Frequencies of programmed death-ligand 1 (PD-L1) expression for all three markers and their combinations; B: Frequencies of programmed cell death protein 1 Ligand 1 (PDCD1 LG1) and PD-L1 (clone SP142) expression and their combination; C: Frequencies of PDCD1 LG1 and PD-L1 [polymerase chain reaction (PCR)] expression and their combination; D: Frequencies of PD-L1 (clone SP142) and PD-L1 (PCR) expression and their combination. PCR: Polymerase chain reaction; PDCD1 LG1: Programmed cell death protein 1 Ligand 1; PD-L1: Programmed death-ligand 1.