- Patients with glioblastoma multiforme (GBM), gliosarcoma, anaplastic astrocytoma (AA), anaplastic oligodendroglioma (AO), anaplastic mixed oligoastrocytoma (AMO), malignant glioma/astrocytoma NOS (not otherwise specified). Also included will be radiographically diagnosed infiltrating brain stem gliomas not amenable to biopsy. Other CNS tumor histologies will not be eligible for this trial.