The goal of this prospective, observational study is to explore the value of dynamic monitoring of minimal residual lesions in driver mutated stage III NSCLC for disease recurrence and prognosis assessment. The main question it aims to answer is:

1) Whether MRD(Minimal residual disease) status can predict recurrence events in stage III driven-mutant NSCLC in advance

Non-small cell lung cancer in stage III (IIIa, IIIIb, IIIc) has a low survival rate, and the 5-year survival rate of stage III patients is less than 30%. In clinical studies of non-small cell lung cancer operable stage III driver gene mutations, postoperative targeted adjuvant therapy improves patient survival relative to postoperative chemotherapy.

The tumor patients still have residual malignant tumor cells in vivo during or after treatment, and minimal residual foci are released during cell necrosis or apoptosis. Early the domestic large lung cancer MRD((Minimal residual disease)) prospective research results, for the first time through the dynamic monitoring of MRD high negative predictive value defined the potential cure population, found that postoperative MRD negative population could not benefit from adjuvant therapy, clarify the existence of preoperative Non-shedding tumor does not affect postoperative MRD monitoring, and exploring the stage II / III MRD turn high risk of postoperative lung cancer. Therefore, for nearly 70% of patients with driver gene-positive non-small-cell lung cancer, detecting clear driver gene mutations in the peripheral blood is expected to stratify the risk of recurrence/progression.

Inclusion Criteria:

1. Patients with stage III non-small cell lung cancer were confirmed by imaging and histological biopsy
2. Age≥ 18
3. ECOG PS:0-1
4. Tumor molecular testing by EBUS or biopsy confirmed positive for one or more of the following driver genes:EGFR\ALK\ROS1\RET\KRAS\PIK3CA\BRAF\HER2\MET
5. Patients who met and agreed to surgery or radical chemoradiotherapy, and the remaining samples after cutting tissue sections did not affect the possible further clinical treatment of the subject
6. Provide 20 mL peripheral blood samples periodically
7. The subjects volunteered to join the study, and signed the informed consent form, with good compliance, and actively cooperated with the hospital for routine clinical diagnosis and treatment follow-up

Exclusion Criteria:

1. Patients with other malignancies within 5 years
2. According to the investigator, the patient also had other diseases that may affect the follow-up and short-term survival
3. The subject had other factors that may lead to the termination of the study, such as other serious diseases (including mental illness), serious laboratory abnormalities, and family or social factors that affected the safety of the subject, or the collection of data and samples

305 The main research purpose of this project is to associate the MRD status of driver gene positive patients with 12 months of recurrent events. The follow-up is 2 years, so according to the number of patients with stage IIIA NSCLC in each center, and the patient enrollment is planned within 1 year. A total of 305 stage III NSCLC patients were collected