Nivolumab treatment beyond RECIST‐defined progression in recurrent or metastatic squamous cell carcinoma of the head and neck in CheckMate 141: A subgroup analysis of a randomized phase 3 clinical trial

Background Response patterns with immune checkpoint inhibitors may be different from those with chemotherapy. Therefore, assessment of response to immunotherapy with the Response Evaluation Criteria in Solid Tumors (RECIST), version 1.1, could result in premature treatment termination. The randomized, open‐label, phase 3 CheckMate 141 trial ({"type":"clinical-trial","attrs":{"text":"NCT02105636","term_id":"NCT02105636"}}NCT02105636), which evaluated nivolumab in recurrent/metastatic squamous cell carcinoma of the head and neck after platinum therapy, allowed treatment beyond first RECIST‐defined progression (TBP) according to protocol‐specified criteria.