Fig. 1From: The frequency of high PD-L1 expression is low in lung adenocarcinoma patients from Northeast BrazilRepresentative figures of immunohistochemical staining for PD-L1 in resected tumors from patients with primary lung adenocarcinoma (400x magnification). (a) PD-L1 TPS < 1%. (b) PD-L1 TPS 2%. (C) PD-L1 TPS ≥50%. PD-L1: programmed cell death-ligand 1, TPS: tumor proportion scoreBack to article page