Several tests will be repeated during the study. Patients will come to M.D. Anderson every 2-4 weeks for a total of 12 weeks. Blood tests will be done during each visit. An MRI scan of the brain will be done every month for 3 months. The physical exam, quality of life questionnaire, and mental functions tests will be repeated 12 weeks after the treatment. Some blood tests, however, may be done by a local doctor. The test results would then be sent to the study coordinator. The follow-up visits will end after 12 weeks.