Phase II Trial: Pembrolizumab vs Observation Post Curative Resection Non-Small Cell Lung Cancer
A randomized trial of adjuvant Pembrolizumab following surgical resection versus observation following surgical resection in patients with stage I non-small cell lung cancer (NSCLC) with primary tumors between 1-4 cm.
Patients will be randomized (1:1) 4-12 weeks following surgery to either:
* Arm A: Pembrolizumab 400 mg every 6 weeks × 9 cycles
* Arm B: Observation
Stratification factors will include: PD-L1 TPS (\<50% vs. ≥50%), and tumor size (1-2 cm vs. \>2-4 cm)