To further investigate the relationship between ZNF521 expression and the infiltration of different immune cell types, we analyzed the correlation between ZNF521 expression and markers of different immune cells, including CD8+ T cells, total T cells, B cells, monocytes, tumor-associated macrophages (TAMs), M1 and M2 macrophages, neutrophils, NK cells, DCs, Th1 cells, Th2 cells, Tfh cells, Th17 cells, regulatory T cells (Tregs), and exhausted T cells (Tex) in gastric cancer (Table 3). This evidence concerns the gene CD8A and neoplasm.