CD4 and neoplasm: After adjusting with tumor purity, PKIA expression levels were significantly correlated with the infiltration levels of B cells (cor = 0.424, p = 2.02e-16), CD8+ T cells (cor = 0.445, p = 4.65e-18), CD4+ T cells (cor = 0.499, p = 4.53e-23), macrophages (cor = 0.565, p = 3.60e-30), neutrophils (cor = 0.419, p = 4.05e-16), and dendritic cells (cor = 0.555, p = 6.59e-29).