Arachnoid CystsArachnoidCystsSubdural SpaceSyringomyeliaArachnoiditisCyst FluidCentral Nervous System CystsSubarachnoid SpaceCranial Fossa, MiddleHematoma, SubduralCranial Fossa, PosteriorOvarian CystsForamen MagnumCraniotomySubdural EffusionDura MaterEpidermal CystNeurosurgical ProceduresSacrococcygeal RegionSpinal Cord CompressionHerniaNeuroendoscopyMagnetic Resonance ImagingCerebral VentriculographyDecompression, SurgicalLaminectomyIophendylateSpinal Cord DiseasesHeadacheCerebrospinal Fluid ShuntsMediastinal CystHypothalamic DiseasesCisterna MagnaPetrous BoneFiresetting BehaviorSynovial CystHydrocephalusSella TurcicaTrephiningHematoma, Subdural, ChronicBone CystsTomography, X-Ray ComputedCerebellar DiseasesBronchogenic CystVentriculoperitoneal ShuntCranial Nerve DiseasesMeningoceleBarotraumaDermoid CystHead Injuries, ClosedNerve Compression Syndromes