EGFR and head and neck squamous cell carcinoma: After we explored the correlation of EGFR, MPS-1, Aurora-B, and KSP expression and clinicopathological features of patients with HNSCC, we observed that EGFR was overexpressed exclusively in male patients (Figure 2a), whereas MPS-1, Aurora-B, and KSP were overexpressed in both male and female patients compared to normal samples (Figure 2d,g,j).