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.
A classic example of a case of invasive oral squamous cell carcinoma, poorly differentiated, showing diffuse positivity for PD‐L1. (a) Hematoxylin & eosin stain, original magnification ×20; (b) PD‐L1 immunostaining with 22C3 antibody, 90% TPS, 90 CPS. CPS, combined positive score; PD‐L1, programmed cell death‐ligand 1; TPS, tumor proportion score.
