Performance of Ventana SP263 PD-L1 assay in endobronchial ultrasound guided-fine-needle aspiration derived non-small-cell lung carcinoma samples.

With an overall concordance rate of 82.5% between cytology and histology specimen, this study demonstrates the feasibility of PD-L1 IHC with SP263 clone on cytology samples of NSCLC and adds to a growing body of evidence validating the use of cytology cell blocks for PD-L1 expression testing.