Multicenter, Single-Arm, Prospective Phase II Study of Neoadjuvant Cryo-Thermal Ablation Combined With Toripalimab and Chemotherapy for Resectable Stage IB-IIIB Non-Small Cell Lung Cancer

Neoadjuvant chemoimmunotherapy has improved outcomes in patients with resectable non-small cell lung cancer (NSCLC), but a substantial proportion of patients do not achieve a major pathological response. Cryo-Thermal Ablation may induce immunogenic tumor cell death and remodel the tumor immune microenvironment, potentially enhancing the antitumor activity of subsequent chemoimmunotherapy. This multicenter, single-arm, open-label, prospective Phase II study will evaluate the efficacy and safety of CT-guided Cryo-Thermal Ablation followed by toripalimab plus platinum-based doublet chemotherapy as neoadjuvant treatment for patients with resectable stage IB-IIIB NSCLC. For stage IB disease, only patients with cT2aN0M0 disease and a maximum primary tumor diameter of 4.0 cm are eligible. Patients with more advanced disease must be considered resectable by multidisciplinary team assessment according to the study protocol. Approximately 40 participants will receive Cryo-Thermal Ablation followed by 3 planned cycles of toripalimab plus platinum-based doublet chemotherapy and subsequent curative-intent surgical resection. The primary outcome is the pathological complete response (pCR) rate. Secondary outcomes include major pathological response (MPR) rate, objective response rate (ORR), R0 resection rate, event-free survival (EFS), overall survival (OS), treatment-emergent adverse events (TEAEs), and health-related quality of life. Exploratory translational analyses will investigate treatment-associated local and systemic antitumor immune responses and molecular dynamics using spatial transcriptomics, T-cell receptor sequencing, tumor genomic profiling, circulating tumor DNA analysis, imaging mass cytometry, and exploratory intratumoral metagenomic and metabolomic profiling.