Interobserver agreement in programmed cell death-ligand 1 immunohistochemistry scoring in nonsmall cell lung carcinoma cytologic specimens.

William SinclairPeter KobalkaRongqin RenBoulos BeshaiAbberly A Lott LimbachLai WeiPing MeiZaibo Li

Published in: Diagnostic cytopathology (2020)

Our data suggest that TPS of PD-L1 IHC on cytology specimens is reproducible, with a better agreement when using 50% as the cutoff value. However, special attention is required when the TPS is near the 1% cutoff.

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