ArachnoidArachnoid CystsSpineSubarachnoid SpaceDura MaterSubdural SpaceSyringomyeliaArachnoiditisMeningesCranial SinusesHematoma, SubduralCentral Nervous System CystsSpinal Cord CompressionCraniotomyCranial Fossa, MiddleCranial Fossa, PosteriorNeurosurgical ProceduresMagnetic Resonance ImagingSubdural EffusionDecompression, SurgicalForamen MagnumLaminectomyLumbar VertebraeHerniaThoracic VertebraeGranulation TissueSpinal Cord DiseasesSpinal DiseasesCerebrospinal FluidMeningiomaSacrococcygeal RegionHydrocephalusCervical VertebraePneumoencephalographyCerebral VentriculographyNeuroendoscopyCerebrospinal Fluid ShuntsHeadacheTomography, X-Ray ComputedMeningeal NeoplasmsTrephiningHypothalamic DiseasesEncephaloceleIophendylateSella TurcicaCerebrospinal Fluid PressureMyelographyHematoma, Subdural, ChronicPetrous BoneCisterna MagnaSpinal InjuriesKeratin-8Nerve Compression SyndromesMeningoceleCystsCerebrospinal Fluid RhinorrheaFiresetting BehaviorParietal BoneHemifacial SpasmDendritesCranial Nerve Diseases