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Background:Programmed cell death ligand 1(PD-L1)plays a fundamental role in the initiation and progression of gastric cancer(GC).Moreover,PD-L1 is a promising therapeutic target for GC in Immunologic checkpoint therapy.However,its prognostic value and Clinicopathologic significance remains controversial in GC.This study mainly aimed to investigate the prognostic role of PD-L1 expression for patients with GC.