Notably, previous studies reported that EGCG inhibits the activation of EGFR and human epidermal growth factor receptor 2 (HER2) in human lung cancer cells [31,32], and EGCG inhibits the tyrosine kinase activity of EGFR in human A431 epidermoid carcinoma cells [33]. The gene discussed is ERBB2; the disease is squamous cell carcinoma.