AstrocytomaBrain NeoplasmsOligodendrogliomaGlioblastomaGliomaSupratentorial NeoplasmsHypothalamic NeoplasmsSpinal Cord NeoplasmsEpendymomaBrain Stem NeoplasmsCentral Nervous System NeoplasmsMeningiomaNeoplasm GradingImmunohistochemistryOptic Nerve NeoplasmsNimustineCerebellar NeoplasmsTuberous SclerosisMeningeal NeoplasmsChromosomes, Human, Pair 19Isocitrate DehydrogenaseNervous System NeoplasmsGlial Fibrillary Acidic ProteinGenes, Neurofibromatosis 1AstrocytesKi-67 AntigenChromosomes, Human, Pair 10Tumor Markers, BiologicalNeoplasms, NeuroepithelialCerebral Ventricle NeoplasmsPrognosisNeurofibromatosis 1Immunoenzyme TechniquesCranial Nerve NeoplasmsChromosomes, Human, Pair 1Gene Expression Regulation, NeoplasticLoss of HeterozygosityDNA, NeoplasmGenes, p53Nitrosourea CompoundsTissue Array AnalysisInterleukin-13 Receptor alpha2 SubunitFourth VentricleNeurilemmomaNeurofibromin 1BrainTumor Suppressor Protein p53MedulloblastomaTenascinMagnetic Resonance ImagingChromosomes, Human, Pair 17Reverse Transcriptase Polymerase Chain ReactionNeoplasm ProteinsInfratentorial NeoplasmsProto-Oncogene Proteins B-rafAcrylonitrileCraniotomySurvival AnalysisDisease ProgressionTumor Cells, CulturedNeurosurgical ProceduresMutationOptic ChiasmChromosome DeletionPTEN PhosphohydrolaseTumor Suppressor ProteinsRNA, MessengerGene DosageGene AmplificationCell Transformation, NeoplasticDNA MethylationIn Situ Hybridization, FluorescenceRNA, NeoplasmSurvival RateKarnofsky Performance StatusReceptor, Epidermal Growth FactorAngiofibromaChromosome AberrationsBase SequenceDNA Modification MethylasesAntigens, CD63Retrospective StudiesDacarbazineNeoplasm InvasivenessBrain ChemistryChromosomes, Human, Pair 9Nucleic Acid HybridizationBlotting, WesternCell Line, TumorPolymerase Chain ReactionMolecular Sequence DataReceptor, Platelet-Derived Growth Factor alphaNeoplasm Recurrence, LocalNeuroectodermal Tumors, PrimitivePhosphoric Monoester HydrolasesNeovascularization, PathologicGenes, Tumor SuppressorKaplan-Meier EstimateOligonucleotide Array Sequence AnalysisBiopsy