Synergistic Effect of Elemene Plus TKIs Compared With TKIs in EGFR-mutated Advanced NSCLC：Prospective Study

About 9.2%-45.8% of Chinese patients with Non-small cell lung cancer were positive for EGFR gene mutation. Gefitinib, Erlotinib, Icotinib, Afatinib showed efficacy superior to that of chemotherapy in the treatment of EGFR mutation positive advanced NSCLC, and lower rates of serious adverse events. However, after a median of 8 to 13 months of disease control, patients ultimately progress due to acquired resistance of EGFR-TKIs. Elemene, a chemotherapeutic isolated from the Chinese medicinal herb Rhizoma Zedoariae, has been shown to have a comprehensive anti-tumor effect and the potential effect on reversing drug resistance. In this study, about 22 research centers will participate in. We planned to enroll 744 patients with advanced non-small cell lung adenocarcinoma who were positive for EGFR mutations. The dynamic random method will be adopted in this study. Patients will be randomly divided into the experimental group（Elemene plus first or third generation EGFR-TKIs), and control group (First or third generation EGFR-TKIs, only). The purpose of this study is evaluating the synergistic effect and safety of Elemene plus TKIs in EGFR-mutated advanced non-small cell lung cancer. We also try to analyze the correlation between molecular biomarkers and patient prognosis, including but not limited to drug-resistant genes and circulating tumor cells.