The Efficacy and Safety of Sintilimab Plus Chemotherapy in Surgical Conversion for Patients With Unresectable Stage IIIB-IIIC NSCLC: A Prospective, Single-Arm, Phase II Study

Patients will receive 3-4 cycles of induction therapy with Sintilimab combined with platinum-based doublet chemotherapy, followed by multidisciplinary team (MDT) evaluation. For patients deemed eligible for radical lung primary lesion resection, surgery should be performed within 4-6 weeks after completing the final cycle of chemoimmunotherapy. The timing of radiotherapy for metastatic lymph nodes will be determined by MDT discussion. If deemed inoperable after induction therapy by MDT, definitive radiotherapy will be administered subsequently. All patients, in the absence of contraindications, will receive PD-1 inhibitor maintenance therapy for 1 year following local treatment.