CD4 and cancer: Also, four highly expressed LUAD-associated immune infiltrating cells (macrophage M0, macrophage M2, T-cell CD4 memory dormancy, and B-cell naïve) related to LUAD and cancer paracellular were identified via the CIBERSORT algorithm, and five immune cells (B-cell naïve, T-cell CD4 naïve, T-cell gamma delta, monocytes, macrophage M1) showed significantly difference in high and low risk LUAD groups.