Hypofractionated Stereotactic Radiotherapy With Bevacizumab in the Treatment of Recurrent Malignant Glioma

Treatment: (until treatment failure): bevacizumab 10 mg/kg IV once every two weeks on days 1 (+/- 3 days) and 15 (+/- 3 days) of every cycle (Cycle defined as 28 days). On day 28 (or up to 2 days before) of cycles 1 and 2 (and for every other cycle thereafter) patients will undergo a physical and radiological re-evaluation (MRI). Patients will begin stereotactic radiotherapy beginning anywhere from day 7 to day 10 of cycle 2 with escalating fraction sizes (interpatient - there is no intrapatient escalation). Assessment of response will be performed following cycles 1 and 2 then following every two cycles.