Referring to the TCGA HNSC tumor dataset, we found a positive correlation between IFN-γ-related genes (IFN-γ, CD8A, and STAT1) and PD-L1 (CD274), but not between EGF-related genes (EGFR, AKT1, and MAP2K7), which seems to support the results of this study (Figure 6). Here, EGF is linked to neoplasm.