CD274 and neoplasm: In NSCLC, concordance has been demonstrated for tumour cell (TC) staining between the VENTANA PD-L1 (SP263) assay, the Dako PD-L1 IHC PharmDx 28-8 assay and the PD-L1 IHC PharmDx 22C3 assay, indicating that it may be possible to use these assays interchangeably analytically [1].