Pembrolizumab and Combination Chemotherapy in Treating Patients With Relapsed or Refractory Hodgkin Lymphoma

The purpose of this research study is to evaluate a new drug Pembrolizumab in combination with chemotherapy, for Relapsed/Refractory Hodgkin Lymphoma. The chemotherapy regimen is called "ICE" and includes three drugs: ifosfamide, carboplatin, and etoposide. Pembrolizumab is currently Food and Drug Administration (FDA) approved for the treatment of some patients with melanoma, lung cancer and head and neck cancer, but has not yet been approved for the treatment of Relapsed/Refractory Hodgkin Lymphoma. The 'ICE' regimen of chemotherapy is currently FDA approved for the treatment of Relapsed/Refractory Hodgkin Lymphoma, but has not yet been investigated in combination with pembrolizumab for this disease. For patients who have a relapse of their Hodgkin's lymphoma, retreatment with chemotherapy followed by a stem cell transplant is recommended. We know that obtaining a complete remission (not able to detect any disease on scans) is very important prior to proceeding to the stem cell transplant. Patients with negative scans have a lower chance of the disease coming back and a higher chance of achieving a long-term cure.