Bendamustine Hydrochloride, Rituximab, Etoposide, and Carboplatin in Treating Patients With Relapsed or Refractory Diffuse Large B-cell Lymphoma or Hodgkin Lymphoma

This phase I/II trial is studying the side effects and best dose of bendamustine hydrochloride when given together with carboplatin, etoposide, and rituximab in treating patients with diffuse large B cell lymphoma or Hodgkin lymphoma that has come back after a period of improvement or has not responded to previous treatment. Drugs used in chemotherapy, such as bendamustine hydrochloride, etoposide, and carboplatin, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Monoclonal antibodies, such as rituximab, may block cancer growth by targeting certain cells. Giving bendamustine hydrochloride together with carboplatin, etoposide, and rituximab may kill more cancer cells.