This is a open-label, randomized phase 2 multi-center study of the anti-tumor efficacy of evorpacept (ALX148) + pembrolizumab + 5FU + platinum and of pembrolizumab + 5FU + platinum in patients with metastatic or unresectable, recurrent HNSCC who have not yet been treated for their advanced disease. The study comprises of an initial safety lead-in followed by a randomized portion.
