This is a phase II study of the combination of Gliadel followed by Avastin and irinotecan in grade IV malignant glioma patients. The study will have survival and toxicity endpoints. Subjects will be identified by the investigator as those patients who have histologically documented grade IV malignant glioma (glioblastoma multiforme or gliosarcoma) with recurrent or progressive disease who are able to undergo a gross total resection (GTR).