ArachnoidArachnoid CystsDura MaterSubarachnoid SpaceMeningesSubdural SpaceCraniotomySyringomyeliaCranial SinusesArachnoiditisHematoma, SubduralCranial Fossa, PosteriorLaminectomyCentral Nervous System CystsForamen MagnumNeurosurgical ProceduresParietal BoneCranial Fossa, MiddleMagnetic Resonance ImagingSpinal Cord CompressionSubdural EffusionDecompression, SurgicalSpinal Cord DiseasesHerniaGranulation TissueCerebrospinal FluidHeadacheCerebrospinal Fluid PressureMeningiomaCerebrospinal Fluid RhinorrheaHydrocephalusSacrococcygeal RegionPneumoencephalographyCerebral VentriculographyHematoma, Subdural, ChronicNeuroendoscopySella TurcicaCerebrospinal Fluid ShuntsSkull BaseTomography, X-Ray ComputedMyelographyTrephiningHypothalamic DiseasesMeningeal NeoplasmsMeningoceleEncephaloceleIophendylatePetrous BoneCisterna MagnaFibrin Tissue AdhesiveSkullKeratin-8Thoracic VertebraeFiresetting BehaviorCystsHemifacial Spasm