EpendymomaAstrocytomaCerebellar NeoplasmsHypothalamic NeoplasmsOptic Nerve NeoplasmsBrain NeoplasmsThalamic DiseasesAntineoplastic ProtocolsSupratentorial NeoplasmsOptic ChiasmHypothalamus, AnteriorInfratentorial NeoplasmsNeurofibromatosis 1CraniopharyngiomaSpinal Cord NeoplasmsProto-Oncogene Proteins B-rafGliomaMagnetic Resonance ImagingComparative Genomic HybridizationCerebral Ventricle NeoplasmsCentral Nervous System NeoplasmsGlioblastomaAnaplasiaBrain Stem NeoplasmsOligodendrogliomaGangliogliomaGenes, Neurofibromatosis 1Cauda EquinaNeurosurgical ProceduresNeurofibromin 1SiderosisSacrococcygeal RegionCranial Nerve NeoplasmsMedulloblastomaRadiotherapy, ConformalImmunohistochemistryCranial Fossa, PosteriorFourth VentricleNeoplasm Recurrence, LocalGlioma, Subependymal