CD8A and head and neck squamous cell carcinoma: Twenty-two types of TILs significantly related to SLC2A3 expression levels in HNSCC, such as central memory CD8 T (Tcm CD8) cells, type 1 helper (Th1) cells, regulatory T (Treg) cells, memory B (Mem B) cells, natural killer (NK) cells, natural killer T (NKT) cells, plasmacytoid dendritic cells (pDCs), macrophages, eosinophils, and mast cells (mast) (Figure 7(d)).