As with the analytic control, morphologic evaluation of stained tissue samples showed high similarity of PD-L1 staining patterns and intensities between PD-L1 IHC 22C3 pharmDx and the 22C3 antibody–based LDT on the BenchMark XT platform in CC, ESCC, HNSCC, TNBC, and UC samples (Fig 4). The gene discussed is CD274; the disease is head and neck squamous cell carcinoma.