Therefore, EGFR-tyrosine kinase inhibitors (TKIs), such as gefitinib, afatinib, and osimertinib, specifically targeting EGFR wild-type (WT), EGFR and HER2 dual targets, and EGFR T790 M, respectively, are effective therapeutic agents for the eradication of lung cancers [3]. The gene discussed is ERBB2; the disease is lung cancer.