2. 7 patients with recurrent histologically confirmed malignant (WHO grade III and IV) glioma or histologically confirmed low-grade (WHO grade II) glioma with radiographic evidence of malignant transformation by MRI, that are refractory to standard therapy, or for whom no standard therapy exists or do not require immediate standard therapy per the multi-disciplinary team decision. Patients in both groups should have stable or decreasing dosage of steroids (e.g. dexamethasone) for a minimum of 7 days prior to baseline MRI. Non-enzyme inducing anti-epileptic drugs are allowed