Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
PD-L1 immunocytochemistry images of non-CB cytology specimens. (A, B, E, F) NSCLC with almost all tumor cells positive for PD-L1. Both membranous as well as diffuse staining is evident. (C, D) PD-L1–negative tumor cells with macrophages serving as an internal positive staining control. (A-D) Laboratory-developed test using concentrated SP142 antibody on Leica Bond. (E, F) SP263 IHC assay on Ventana Benchmark XT (E, magnification ×400; F, magnification ×200).
