Several large-scale phase 3 clinical trials have shown that lung cancer patients harboring susceptible epidermal growth factor receptor (EGFR) mutations who received an EGFR tyrosine kinase inhibitor (TKI) have better clinical efficacy compared with platinum-based chemotherapy, in terms of overall RRs, progression free survival (PFS) and quality of life [7–11]. Here, EGFR is linked to lung cancer.