MeningiomaMeningeal NeoplasmsSkull Base NeoplasmsArachnoidNeurofibromatosis 2Skull NeoplasmsGenes, Neurofibromatosis 2Brain NeoplasmsNeurofibromin 2HemangiopericytomaNeurilemmomaMagnetic Resonance ImagingNeuroma, AcousticChromosomes, Human, Pair 22Neurosurgical ProceduresDura MaterCerebellopontine AngleTomography, X-Ray ComputedCerebral Ventricle NeoplasmsSpinal Cord NeoplasmsCraniotomyMeningesOptic Nerve NeoplasmsEar NeoplasmsCranial Fossa, PosteriorHyperostosisRetrospective StudiesRadiosurgeryForamen MagnumCranial Nerve NeoplasmsGliomaSphenoid BoneDelayed DiagnosisSensitivity and SpecificityOctreotideChromosomes, Human, Pair 1Neoplasm Recurrence, LocalSella TurcicaSkull BaseDog DiseasesPrenatal DiagnosisEarly Diagnosis