CD4 and cancer: The results showed that ZNF521 expression was significantly correlated with tumor purity in 25 cancer types, B-cell infiltration levels in 23 cancer types, CD4+ T cells in 28 cancer types, CD4+ T cells in 21 cancer types, DCs in 23 cancer types, macrophages in 31 cancer types, and neutrophils in 25 cancer types (Table S1).