Objective:To systematicly review the studies on the relation between tumor-associated macrophages(TAM)and the prognosis of gastric cancer(GC).Methods:Ten studies(n=930patients)were included to estimate the relationship between TAM and the overall survival(OS)or disease free survival(DFS)of GC.Hazard ratios(HRs)and 95% confidence intervals(CIs)were calculated by the STATA software.Results:The HRof OS of GC patients with high TAM is 1.72(95% CI:1.30-2.13,P<0.001)as compared with those with low TAM,and that of...