Dura MaterHematoma, SubduralSubdural SpaceHematoma, Subdural, ChronicEmpyema, SubduralHematoma, Subdural, AcuteSubdural EffusionHematoma, Subdural, SpinalArachnoidCraniotomyPia MaterParietal BoneMeningeal ArteriesCranial SuturesMeningesSubarachnoid SpaceSumatriptanLaminectomyHematoma, Epidural, CranialTrigeminal NerveNeurosurgical ProceduresEpidural SpacePneumocephalusSkullMeningiomaMeningeal NeoplasmsTomography, X-Ray ComputedCerebrospinal Fluid RhinorrheaCraniosynostosesCreutzfeldt-Jakob SyndromeSkull BaseFrontal BoneScalpTissue TransplantationMeningitisForamen MagnumMagnetic Resonance ImagingSpinal CanalLigamentum FlavumCalcitonin Gene-Related PeptideIsoindolesArachnoid CystsHeadacheDecompression, SurgicalTrigeminal GanglionCadaverCraniocerebral TraumaSpinal Cord CompressionTrigeminal Nucleus, SpinalLongitudinal LigamentsMyelographyPolytetrafluoroethyleneFatal OutcomeIntracranial HypotensionMigraine DisordersHead Injuries, Closed