Non-small cell lung cancer (NSCLC) is the main subtype of lung cancer, accounting for about 80% of lung cancer cases.1 Early diagnosis is crucial for the treatment and prognosis of NSCLC patients.2 Epidermal growth factor receptor (EGFR) is one of the important factors responsible for the development and progression of NSCLC. The gene discussed is EGFR; the disease is non-small cell lung carcinoma.