Through in‐house tissue microarrays, conspicuously positive BCAT1 protein staining was not detected in non‐HNSCC tissues (Figure 10A–D and Figure 10I–L) but in HNSCC tissues (Figure 10E–H,M–P), demonstrating high BCAT1 protein levels in HNSCC, which was confirmed using the Wilcoxon tests (Figure 10Q). This evidence concerns the gene BCAT1 and head and neck squamous cell carcinoma.