Phase 3 Trial Comparing Immunotherapy-Based Drug Combinations With or Without Kidney Removal Surgery in Metastatic Kidney Cancer

What this Trial Is About

Researchers are investigating treatments for patients with metastatic kidney cancer, focusing on whether adding surgery to a standard immunotherapy-based drug combination improves overall survival. This phase III trial compares outcomes for patients receiving immunotherapy with or without surgery to remove the kidney, known as nephrectomy. Immunotherapy drugs like nivolumab, ipilimumab, pembrolizumab, and avelumab aim to help the immune system attack the cancer, while axitinib works to block tumor growth. The benefit of adding surgery to these drug treatments is not yet established. Participants first receive one of three standard immunotherapy-based regimens before randomization, including combinations of intravenous nivolumab, ipilimumab, pembrolizumab, avelumab, and oral axitinib. After about 10 to 14 weeks of this initial treatment, patients are randomly assigned to continue systemic therapy alone or to receive surgery to remove the kidney plus the same systemic therapy. Surgery may be radical or partial and performed using laparoscopic, open, or robotic methods within 8 weeks of randomization. Axitinib is paused before surgery and resumed after recovery. Throughout the study, participants undergo scans and clinical assessments to monitor tumor response and side effects. After completing treatment, patients are followed up every 3 months during the first year, then every 6 months for years two and three, and annually thereafter for up to seven years. The trial measures overall survival, tumor response in metastatic sites, changes in tumor size, and complications from surgery or drug toxicities. Specimens are also collected for future research to better understand the disease and treatments.

Comparing the Outcome of Immunotherapy-Based Drug Combination Therapy With or Without Surgery to Remove the Kidney in Metastatic Kidney Cancer, the PROBE Trial