Cranial Fossa, PosteriorCranial Fossa, MiddleCranial Fossa, AnteriorInfratentorial NeoplasmsSkull BaseArachnoid CystsArnold-Chiari MalformationDandy-Walker SyndromeCraniotomyCerebellopontine AngleCerebellar NeoplasmsCranial Nerve NeoplasmsTrigeminal Nerve DiseasesOtologic Surgical ProceduresMutismDura MaterFourth VentricleCerebellar DiseasesSkull Base NeoplasmsMagnetic Resonance ImagingTemporal BoneOccipital BoneTomography, X-Ray ComputedHematoma, Epidural, CranialHematoma, SubduralNeurosurgical ProceduresArachnoidSyringomyeliaSkull NeoplasmsFacial Nerve DiseasesCerebral VeinsCisterna MagnaMeningeal NeoplasmsEthmoid BoneEar DiseasesCentral Nervous System Vascular MalformationsEar, MiddlePterygopalatine FossaSubdural EffusionTrigeminal NeuralgiaEpendymomaMedulloblastomaOsteomaEthmoid SinusDermoid CystPetrous BoneSphenoid BoneMastoidSkullZygomaCerebral VentriculographyNeurilemmomaMucoceleCerebellumChondromatosis, SynovialHematoma, Subdural, IntracranialCerebral AngiographyHydrocephalusPlatybasiaFrontal SinusForamen MagnumTrephiningFacial ParalysisMeningiomaParanasal Sinus NeoplasmsKlippel-Feil SyndromeCerebral Ventricle NeoplasmsSphenoid SinusNeurocutaneous SyndromesMeningoceleBrain DiseasesDecompression, SurgicalSpasmTrigeminal NerveEpidermal CystEncephaloceleImaging, Three-DimensionalArteriovenous FistulaIntracranial Arteriovenous MalformationsOrbital DiseasesVentriculostomyPneumocephalusCavernous SinusCerebellar AtaxiaNerve Compression SyndromesBrain NeoplasmsFacial MusclesSkull FracturesHemangioblastomaFacial NeoplasmsPostoperative ComplicationsHematoma, Subdural, ChronicCranial IrradiationOrbital NeoplasmsThird VentricleVertebral ArteryTreatment OutcomeDysarthriaNeuroendoscopyBrain Stem