AstrocytomaBrain NeoplasmsHypothalamic NeoplasmsGlioblastomaGliomaOptic Nerve NeoplasmsSupratentorial NeoplasmsOligodendrogliomaSpinal Cord NeoplasmsAstrocytesEpendymomaAnaplasiaTumor Cells, CulturedCerebellar NeoplasmsCentral Nervous System NeoplasmsNeoplasm GradingBrain Stem NeoplasmsNimustineGlial Fibrillary Acidic ProteinMeningeal NeoplasmsMagnetic Resonance ImagingGenes, ModifierMeningiomaImmunohistochemistryDacarbazineNeoplasm Recurrence, LocalPrognosisGangliogliomaOptic ChiasmTreatment OutcomeAntineoplastic Agents, AlkylatingTumor Markers, BiologicalChromosomes, Human, Pair 10Nervous System NeoplasmsSurvival AnalysisThalamic DiseasesCell Line, TumorHypothalamus, AnteriorDisease ProgressionNeurosurgical Procedures