CD8A and head and neck squamous cell carcinoma: After Spearman correlation analysis was conducted, we found that the risk score was positively linked to M0, M1 macrophages, and resting NK cells infiltrating, while being negatively associated with B cells, CD8 T cells, M2 macrophages, myeloid dendritic cells, and monocytes infiltrating in the HNSCC samples (Figure 7A; Supplementary Table S4).