Comparison of PD-L1 Tumor Cell Expression With 22C3, 28-8, and SP142 IHC Assays Across Multiple Tumor Types

Comparison of PD-L1 Tumor Cell Expression With 22C3, 28-8, and SP142 IHC Assays Across Multiple Tumor Types

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The study shows that 22C3 is the most sensitive PD-L1 IHC assay for tumor cell expression and returns a positive PD-L1 status more frequently than 28-8, which in turn is positive more often than SP-142.