- Subjects under the age of 18 must have had prior therapy according to the best available therapy as determined by their primary brain tumor specialist (to include oncology, neurosurgery and/or radiation oncology) including systemic and/or cranial or spinal radiation or chemotherapy; subjects over the age of 18 may be enrolled as part of first-line treatment; those subjects who enroll as first-line treatment will not be restricted from traditional treatments in the future; at least 14 days must have elapsed since completion of cranial radiotherapy and 28 days since completion of chemotherapy; at least 28 days must have elapsed since completion of total spine radiotherapy