This study is for patients with brain cancer. This study is being done to see if by using stereotactic radiosurgery can reduce symptoms and lower the chance of the cancer growing compared to the ususal radiotherapy.

This study is for pediatric patients who have been diagnosed with Brain Tumors. The purpose of this study is to assess the feasibility of a home-based, computerized cognitive training program for patients with pediatric brain tumors who are undergoing cranial radiation therapy (CRT). Participants can expect to receive treatment on this study for about 5 to 9 weeks. Participants will complete additional testing sessions about 6 months after completing the cognitive training program.

This study is for patients who have been diagnosed with a neuroblastoma (NBL). The purpose of this study is to find out if we can improve the treatment for subjects with high-risk NBL by adding the experimental drug 131I-MIBG or the experimental drug Crizotinib to recommended therapy. The secondary purpose is to find out if we can reduce the number of stem cell transplants from two to one if we give the experimental drug 131I-MIBG during Induction, and use different drugs as part of the transplant chemotherapy given prior to stem cell infusion during Consolidation. Participants can expect to be in this study for up to 2 years. Researchers would like to continue to follow participants health for up to 10 years.

This study is for patients who have been diagnosed with high-risk neuroblastoma. The purpose of this study is to learn if the treatment you received for your high-risk neuroblastoma has affected your health overtime. Participants can expect to be in this study for up to 12 weeks.

Subjects are being asked to volunteer for a research study because they have their first anaplastic astrocytoma (AA) tumor progression (worsening) or recurrence.

The purpose of this study is to measure how well and how safe eflornithine is in combination with lomustine, compared to lomustine taken alone, in treating patients whose anaplastic astrocytoma has come back after radiation and chemotherapy. Eflornithine is an experimental drug that the United States Food and Drug Administration (FDA) has not approved it for use by the general public. Lomustine has been approved by the FDA in the United States for this patient population.