This phase II trial studies the side effects of nivolumab and to see how well it works when
given together with ifosfamide, carboplatin, and etoposide in treating patients with Hodgkin
lymphoma that has come back (relapsed) and does not respond to treatment (refractory).
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.
Drugs used in chemotherapy, such as ifosfamide, carboplatin and etoposide, work in different
ways to stop the growth of cancer cells, either by killing the cells, by stopping them from
dividing, or by stopping them from spreading. Giving nivolumab, ifosfamide, carboplatin and
etoposide may work better in treating patients with Hodgkin lymphoma.