GlioblastomaBrain NeoplasmsNeoplasm Recurrence, LocalDacarbazineKarnofsky Performance StatusAntineoplastic Agents, AlkylatingAntibodies, Monoclonal, HumanizedAngiogenesis InhibitorsGliomaDisease-Free SurvivalCarmustineAstrocytomaCamptothecinKaplan-Meier EstimateSurvival RateTreatment OutcomeAntineoplastic Combined Chemotherapy ProtocolsAntineoplastic AgentsDisease ProgressionMagnetic Resonance ImagingQuinazolinesSalvage TherapyMaximum Tolerated DoseCombined Modality TherapyPrognosisDrug Administration ScheduleSurvival AnalysisAntibodies, MonoclonalRecurrenceFollow-Up StudiesRetrospective StudiesTumor Markers, BiologicalCell Line, TumorDNA Modification MethylasesNeoplastic Stem CellsMice, NudeGene Expression Regulation, NeoplasticTumor Cells, CulturedXenograft Model Antitumor AssaysCell ProliferationNeoplasm InvasivenessSupratentorial NeoplasmsCentral Nervous System Neoplasms