08/19/2026
Among patients with recurrent, unresectable, or metastatic , this nonrandomized trial investigated the feasibility and preliminary efficacy of pembrolizumab plus quad-shot radiotherapy (QSRT). The overall response rate was 47%, with median progression-free survival of 9.2 months and median overall survival of 14.9 months. Adverse events were moderate and primarily related to gastrointestinal and dermatologic effects. While these findings support the potential benefit of combining immune checkpoint inhibitors and QSRT, randomized clinical trials are required to determine comparative effectiveness and establish clinical guidelines.
This nonrandomized clinical trial examines the efficacy and toxic effects of immune checkpoint inhibitors in combination with quad-shot radiotherapy for patients with recurrent, unresectable, or metastatic head and neck squamous cell carcinoma.