Avastin in Combination With Temozolomide for Unresectable or Multifocal GBMs and Gliosarcomas

This is Phase II study with the combination of Avastin \& Temozolomide for unresectable or multifocal WHO grade IV malignant glioma patients. Patients will receive up to 4 cycles of Avastin \& Temozolomide . Avastin administered at 10 mg/kg every 14 days beginning minimum of 7 days after biopsy or 28 days after craniotomy. Temozolomide will be dosed at 200 mg/m2 daily x 5 days in 28-day cycle. Patients will have baseline MRI \& repeat MRI every 4 weeks. If there is no evidence of disease progression after each cycle, or unacceptable toxicity, or as determined by investigators, patient non-compliance or patient withdraws consent to continue therapy \& requests discontinuation, patients will receive up to 4 cycles of Avastin \& Temozolomide, then proceed with standard XRT therapy, \& future therapy after 4 cycles will be at discretion of patient \& treating physicians.