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). Here, CD274 is linked to esophageal squamous cell carcinoma.