AstrocytomaBrain NeoplasmsGlioblastomaOligodendrogliomaGliomaSupratentorial NeoplasmsNimustinePrognosisChromosomes, Human, Pair 10Loss of HeterozygosityImmunohistochemistryHypothalamic NeoplasmsCentral Nervous System NeoplasmsSpinal Cord NeoplasmsEpendymomaIsocitrate DehydrogenaseOptic Nerve NeoplasmsBrain Stem NeoplasmsMeningiomaNervous System NeoplasmsTumor Markers, BiologicalMeningeal NeoplasmsNeoplasm GradingGene Expression Regulation, NeoplasticAstrocytesTumor Cells, CulturedCell Line, TumorCerebellar NeoplasmsDacarbazineGlial Fibrillary Acidic ProteinSurvival AnalysisChromosomes, Human, Pair 19Ki-67 AntigenPTEN PhosphohydrolaseMagnetic Resonance ImagingGenes, p53Receptor, Epidermal Growth FactorGene AmplificationImmunoenzyme TechniquesTumor Suppressor ProteinsAntineoplastic Agents, AlkylatingDisease ProgressionChromosomes, Human, Pair 1Survival RateTumor Suppressor Protein p53