Multicenter Phase I Dose Escalation Study of Hypofractionated Stereotactic Radiotherapy with Bevacizumab for Recurrent Glioblastoma and Anaplastic Astrocytoma

It has been reported previously that the combination of bevacizumab with hypofractionated stereotactic re-irradiation (HFSR) with 30Gy (6GyX5 fractions) was safe and efficacious in recurrent glioblastomas and high-grade gliomas (HGG). Because most recurrences are local, developing intensified HFSR dosing schedules remains of interest. We hypothesized that in combination with bevacizumab, HFSR doses could be further escalated, and designed a prospective phase I trial to establish the maximum tolerated dose (MTD) of a 3-fraction HFSR delivered concomitantly with standard doses of bevacizumab.

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