Arachnoid CystsArachnoidSpinal Cord CompressionEpidural SpaceEpidural NeoplasmsPulsed Radiofrequency TreatmentQuipazineCystsElectric Stimulation TherapySpinal CordSyringomyeliaArachnoiditisSubdural SpaceCentral Nervous System CystsSubarachnoid SpaceCranial Fossa, MiddleHematoma, SubduralCranial Fossa, PosteriorForamen MagnumSpinal Cord DiseasesSpinal Cord InjuriesDura MaterSubdural EffusionCraniotomyNeurosurgical ProceduresCyst Fluid