CD4 and head and neck squamous cell carcinoma: Then, based on TCGA-HNSCC data, analyses of the difference in immune cell subpopulations revealed significant differences between the two subgroups for scores of immune cells (B cells, T cells, Myeloid dendritic cells, plasma cells, Macrophage M0, T cell CD4 memory resting, T cell follicular helper, Tregs, NK cells resting, dendritic cells resting, Mast cells, iDCs, pDCs, Th2 cells, and TIL) (p < 0.001; Fig. 4B-E).