Cranial Fossa, PosteriorInfratentorial NeoplasmsDandy-Walker SyndromeCranial Fossa, MiddleCerebellar NeoplasmsMutismArnold-Chiari MalformationFourth VentricleCerebellar DiseasesCerebellopontine AngleSyringomyeliaCranial Fossa, AnteriorArachnoid CystsCisterna MagnaMagnetic Resonance ImagingEpendymomaTrigeminal NeuralgiaMedulloblastomaCraniotomyDermoid CystHematoma, Epidural, CranialNeurosurgical ProceduresCerebral VentriculographyOccipital BoneCerebellumArachnoidForamen MagnumTomography, X-Ray ComputedHydrocephalusPlatybasiaHematoma, SubduralDura MaterSkull NeoplasmsKlippel-Feil SyndromeTrephiningCerebral Ventricle NeoplasmsNeurocutaneous SyndromesMeningiomaPterygopalatine FossaMeningeal NeoplasmsMeningoceleDecompression, SurgicalBrain DiseasesSpasmEpidermal CystSkullEncephaloceleTrigeminal NerveSkull Base NeoplasmsIntracranial Arteriovenous MalformationsVentriculostomyPneumocephalusCerebellar AtaxiaFacial MusclesBrain NeoplasmsTrigeminal Nerve DiseasesNerve Compression SyndromesHemangioblastomaCerebral VeinsSkull FracturesCerebral AngiographySubdural EffusionHematoma, Subdural, ChronicCranial IrradiationFacial NeoplasmsPostoperative ComplicationsThird VentricleVertebral ArteryNeuroendoscopyCranial Nerve NeoplasmsDysarthriaBrain StemTrochlear NerveCerebral VentriclesAstrocytomaIntracranial HemorrhagesCranial Nerve DiseasesRetrospective StudiesArachnoiditisImaging, Three-DimensionalAbnormalities, MultipleUltrasonography, PrenatalSkull BaseHemangiosarcomaDecompressive CraniectomySubarachnoid SpaceCranial SinusesPosterior Cerebral ArteryMicrosurgeryEye AbnormalitiesCerebral HemorrhageSupratentorial NeoplasmsNeuroectodermal Tumors, PrimitiveCystsNeurologic ExaminationNeurothekeomaPosterior Cruciate LigamentSyndromeCervical VertebraeTemporal Bone