Testing the Addition of an Anti-cancer Immune Therapy Drug (Nivolumab) to the Usual Chemotherapy Treatment (Cisplatin or Carboplatin With Gemcitabine) for Recurrent or Metastatic Nasopharyngeal Cancer

This phase III trial compares the effect of adding nivolumab to the usual chemotherapy (cisplatin or carboplatin with gemcitabine) versus standard chemotherapy alone in treating patients with nasopharyngeal cancer that has come back (recurrent) or spread to other places in the body (metastatic). Immunotherapy with monoclonal antibodies, such as nivolumab, may help the body\'s immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Chemotherapy drugs, such as cisplatin, carboplatin, and gemcitabine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving nivolumab with the usual chemotherapy may work better than the standard chemotherapy alone in treating patients with nasopharyngeal cancer.