CD4 and neoplasm: Additionally, after adjusted by tumor purity, CTSF expression was shown to be positively correlated with immune infiltration of B cells (r = 0.212, p = 2.59e−06), CD4+ T cells (r = 0.179, p = 7.83e−05), Macrophage (r = 0.133, p = 3.38e−03), and DCs (r = 0.124, p = 5.93e−03) in LUAD (Fig. 4D).