Despite that prognosis and survival rate can be improved with chemotherapy, adverse reactions are induced accordingly, which has a bearing on the pathological characteristics and epidermal growth factor receptor (EGFR) expression of patients.4 Evidence shows that targeted therapy is superior to traditional cytotoxic chemotherapy in terms of clinical effects in the treatment of advanced NSCLC.5 Here, EGFR is linked to non-small cell lung carcinoma.