The GAD enrichment analysis revealed that these genes were significantly enriched for breast cancer (p = 4.50E‐11), head and neck cancer (p = 2.17E‐07), esophageal cancer (p = 1.54E‐06), epithelial ovarian cancer (p = 4.82E‐06), and lung cancer (p = 7.47E‐06). This evidence concerns the gene GAD1 and head and neck cancer.