BCAT1 and head and neck squamous cell carcinoma: Through comprehensively investigating a large sample (n of public data = 1818, n of in‐house tissue microarrays = 258), our study demonstrated that BCAT1 was significantly highly expressed in HNSCC at both the mRNA and protein levels in all four subgroups of HNSCC—LSCC, OSCC, PSCC, and USCC.