Stereotactic Body Radiotherapy for Oligo-Progression Metastatic Non-Small Cell Lung Cancer

This study is a prospective, randomized, controlled, open-label, multi-center phase Ⅲ study of patients with stage IV NSCLC who developed oligo-progression after prior first-line chemotherapy with clinical benefit lasting for ≥3 months, aiming to evaluate the efficacy and safety of applying SBRT to treat oligo-progressive NSCLC. NSCLC patients with oligo-progression (≤5 extracranial progression sites) after ≥3 months of clinical benefit by first-line systemic therapy and who are suitable for SBRT will be screened to meet the enrollment criteria after signing the informed consent and will be randomized to the SBRT/standard of care (SOC) groups according to the stratification ratio of 1:1. SBRT group: SBRT was performed on the progressive sites. During SBRT treatment, maintenance therapy was with ICI or bevacizumab or combined single-agent chemotherapy. Evaluation was performed after completion of SBRT treatment. After the occurrence of progression that is no longer suitable for SBRT treatment, switch to second-line systemic therapy (same as SOC). SOC group: Second-line systemic therapy is based on docetaxel or albumin-paclitaxel. The combination of immunotherapy or anti-vascular drugs is evaluated by the study physician. The specific drug regimen is determined in conjunction with the patient's wishes. Palliative radiotherapy is acceptable.