To evaluate the efficacy and safety of sintilimab combined with bevacizumab in the treatment of metastatic nasopharyngeal carcinoma (NPC) after platinum-based chemotherapy failure. The primary end point is objective response rate (ORR), the secondary end points are overall survival (OS), progression-free survival (PFS), duration of response (DOR), adverse effects and quality of life.
To evaluate the efficacy and safety of PD-1 immune checkpoint inhibitor combined with bevacizumab in the treatment of metastatic nasopharyngeal carcinoma after failure of platinum-based chemotherapy.