In Figure 1(a), HOXA1 expression was markedly upregulated in CESC, CHOL, ESCA, glioblastoma multiforme (GBM), head and neck squamous cell carcinoma (HNSC), kidney renal papillary cell carcinoma (KIRP), LUAD, lung squamous cell carcinoma (LUSC), prostate adenocarcinoma (PRAD), and stomach adenocarcinoma (STAD) in comparison to normal tissues. This evidence concerns the gene HOXA1 and head and neck squamous cell carcinoma.