Although chemotherapy was once considered the first-line treatment for NSCLC, advancements in targeted gene research have given rise to epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs), such as erlotinib and gefitinib, to replace chemotherapy as the first-line therapy for NSCLC patients who are positive for the relevant driver genes [2, 3]. The gene discussed is EGFR; the disease is non-small cell lung carcinoma.