Clinical evaluations include physical exam, vitals, KPS, neurological exam and blood hematology and chemistries (obtained once every month throughout treatment). Neuro-imaging and assessment for response will be performed approximately every 3 months. QOL will be assessed with the KPS rating scale and the FACT-Br questionnaire at screening and then every six months during treatment. Blood will be collected for correlative studies on Day 1 of every even cycle. Any molecular information derived from the correlative studies or clinical care will be associated with the patient's response.