2. Subjects must have glioma for which surgical resection is clinically indicated. Grade I, II, III and IV glioma patients will be included (for example glioblastoma, astrocytoma, and oligodendroglioma). Histological confirmation not required prior to surgery. Subjects with recurrent disease will be eligible only if the duration between last brain surgery and scheduled new surgery is ≥3 months. The grade of a recurrent tumor will be presumed that of the primary tumor for purposes of group allocation.