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Perioperative tislelizumab plus chemotherapy improves survival in Chinese patients with resectable NSCLCTislelizumab with chemotherapy before surgery improves survival in Chinese lung cancer patients

AI-generated summary of the cited source, checked by automated accuracy review. How we work

Key Takeaway
Consider perioperative tislelizumab plus chemo for resectable NSCLC in China based on phase III OS/EFS benefit.

This final analysis of a randomized, double-blind, phase III trial enrolled 453 adult patients in China with resectable, stage II-IIIA non-small-cell lung cancer. Participants received either perioperative tislelizumab plus neoadjuvant chemotherapy or placebo plus neoadjuvant chemotherapy. The primary outcomes were event-free survival (EFS) and major pathological response, with overall survival (OS) as a key secondary endpoint.

After a median follow-up of 38.5 months, the tislelizumab regimen demonstrated a statistically significant OS benefit, with a hazard ratio of 0.65 (95% CI 0.45-0.93; P=0.009). The 36-month OS rate was 79.3% in the tislelizumab group versus 69.3% in the placebo group. For EFS, the median was not reached in the tislelizumab group compared to 30.6 months in the placebo group (HR 0.58; 95% CI 0.43-0.79).

The safety profile was reported as tolerable and consistent with the known profiles of the individual therapies, though specific adverse event rates, serious adverse events, and discontinuation data were not detailed in this summary. Key limitations include that the study population was limited to China, which may affect generalizability to other ethnic or geographic groups, and median OS was not reached in either treatment arm. The findings are relevant for clinicians treating this specific patient population in China, supporting the perioperative use of this combination, but broader application awaits further evidence.

Researchers conducted a major clinical trial to see if adding an immunotherapy drug called tislelizumab to standard chemotherapy before surgery would help patients with a specific type of lung cancer. The study involved 453 adults in China with stage II-IIIA non-small-cell lung cancer that could be removed by surgery. They compared patients who got tislelizumab plus chemotherapy before and after surgery to those who got a placebo plus the same chemotherapy.

After a median follow-up of about 38.5 months, the group receiving tislelizumab lived longer. The three-year overall survival rate was 79.3% for the tislelizumab group compared to 69.3% for the placebo group. The treatment also significantly delayed cancer recurrence or other negative events, with the median time not yet reached for the tislelizumab group versus 30.6 months for the placebo group.

The study reported that the safety of the tislelizumab regimen was tolerable and matched what is known about these types of drugs, but it did not provide detailed safety numbers. The main reason for caution is that all participants were from China, so the results may not directly translate to patients with different genetic backgrounds or healthcare systems. Readers should see this as strong evidence supporting this treatment approach for this specific group, but they should discuss with their doctor whether it is appropriate for their individual situation.

What this means for you:
A large trial in China found a survival benefit for adding immunotherapy to chemo before lung cancer surgery.

Study Details

Study typeRct
Sample sizen = 453
EvidenceLevel 2
Follow-up38.5 mo
PublishedApr 2026
View Original Abstract ↓
BACKGROUND: Perioperative immunotherapy, particularly anti-programmed cell death protein 1 therapy, combined with neoadjuvant chemotherapy has emerged as one of the standard-of-care options for resectable non-small-cell lung cancer (NSCLC). We report the final analysis of RATIONALE-315, a randomized, double-blind, phase III trial evaluating the efficacy and safety of perioperative tislelizumab plus neoadjuvant chemotherapy versus neoadjuvant chemotherapy alone in patients with resectable, stage II-IIIA NSCLC. PATIENTS AND METHODS: Adult patients in China were randomized (1 : 1) to receive either perioperative tislelizumab or placebo in combination with neoadjuvant chemotherapy. The dual primary endpoints were event-free survival (EFS) and major pathological response, assessed by blinded independent central review. The secondary endpoints included pathological complete response, overall survival (OS), disease-free survival, and safety. RESULTS: In total, 453 patients were randomized (226 to tislelizumab and 227 to placebo). At the final analysis (median study follow-up of 38.5 months), patients in the tislelizumab group experienced statistically significantly improved OS versus those in the placebo group {hazard ratio (HR) 0.65 [95% confidence interval (CI) 0.45-0.93]; P = 0.009}. The median OS was not reached in either group. The 36-month OS rate was 79.3% in the tislelizumab group versus 69.3% in the placebo group. The median EFS was not reached in the tislelizumab group versus 30.6 months in the placebo group [HR 0.58 (95% CI 0.43-0.79)]. Survival benefits were generally consistent across subgroups. The safety profile of tislelizumab plus chemotherapy was tolerable and consistent with known profiles of the individual therapies. CONCLUSIONS: Neoadjuvant tislelizumab plus chemotherapy and adjuvant tislelizumab demonstrated a statistically significant, clinically meaningful OS benefit and sustained, clinically meaningful EFS improvement compared with neoadjuvant chemotherapy, with a tolerable safety profile in patients with resectable stage II-IIIA NSCLC. These results support the use of this regimen in this patient population. CLINICAL TRIAL NUMBER: NCT04379635.
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