The results showed that the GPX8 expression level was positively correlated with infiltrating levels of CD8+ T cells (r = 0.216, P = 2.82e−05), CD4+ T cells (r = 0.151, P = 3.87e−03), macrophages (r = 0.521, P = 3.67e−27), neutrophils (r = 0.28, P = 3.99e−08), and dendritic cells (r = 0.39, P = 6.52e−15) in stomach adenocarcinoma. Here, CD4 is linked to gastric adenocarcinoma.