AstrocytomaBrain NeoplasmsHypothalamic NeoplasmsOptic Nerve NeoplasmsCerebellar NeoplasmsInfratentorial NeoplasmsCranial Nerve NeoplasmsGenes, Neurofibromatosis 1Neurofibromatosis 1GliomaGlioblastomaNeurofibromin 1PrognosisOligodendrogliomaImmunohistochemistryBrain Stem NeoplasmsThalamic DiseasesEpendymomaOptic ChiasmSupratentorial NeoplasmsCentral Nervous System NeoplasmsSpinal Cord NeoplasmsAntineoplastic ProtocolsAnaplasiaHypothalamus, AnteriorGangliogliomaCraniopharyngiomaProto-Oncogene Proteins B-rafTumor Markers, BiologicalMagnetic Resonance ImagingNeoplasm GradingNimustineMeningiomaGene Expression Regulation, NeoplasticAstrocytesImmunoenzyme TechniquesMeningeal NeoplasmsGlial Fibrillary Acidic ProteinDNA, NeoplasmNeoplasm Recurrence, LocalComparative Genomic HybridizationNervous System NeoplasmsSurvival AnalysisTumor Cells, CulturedGene DosageTuberous Sclerosis