CD4 and neoplasm: In training set, tumor-infiltrating immune cells including B cell (correlation (cor) = −0.197, P = 0.006), CD4+ T cell (cor = −0.132, P = 0.069), CD8+ T cell (cor = −0.176, P = 0.015), dendritic cell (cor = −0.180, P = 0.013), macrophage (cor = −0.128, P = 0.077), and neutrophil (cor = −0.140, P = 0.054) were negatively correlated with risk score (Figures 5A–F).