CD4 and head and neck squamous cell carcinoma: As shown in Figure 11A, in HNSCC, BAK1 has a positive correlation with CD8+ T cells, CD4+ T cells, neutrophils, and DC infiltration while having a negative correlation with B cells and macrophage cell infiltration; as shown in Figures 11B–D, NLRP1, CHMP7, and RIPK1 genes and immune cell infiltration all show some positive correlation.