ArachnoidDura MaterArachnoid CystsCerebral HemorrhageSkullPia MaterSkull BaseSubarachnoid HemorrhageParietal BoneCerebral InfarctionSubarachnoid SpaceMeningesHemorrhageCraniotomyCranial SuturesMeningeal ArteriesCerebral ArteriesTomography, X-Ray ComputedCerebral Amyloid AngiopathyCerebrovascular DisordersIntracranial HemorrhagesIntracranial Hemorrhage, HypertensiveLaminectomySkull NeoplasmsHematoma, SubduralCapillary FragilityBrainSkull Base NeoplasmsMagnetic Resonance ImagingMeningiomaNeurosurgical ProceduresCerebral AngiographySumatriptanForamen MagnumCerebrospinal Fluid RhinorrheaMeningeal NeoplasmsCerebral Amyloid Angiopathy, FamilialSubdural SpaceCerebrovascular CirculationTrigeminal NerveMiddle Cerebral ArteryCraniosynostosesSkull FracturesEpidural SpaceAmyloidosisBrain IschemiaIntracranial Embolism and ThrombosisFatal OutcomeSpinal Cord CompressionIntracranial AneurysmSyringomyeliaStrokeCreutzfeldt-Jakob SyndromeHematomaCranial SinusesDecompression, SurgicalRetinal HemorrhageHemangioma, Cavernous, Central Nervous SystemJapanCerebral Hemorrhage, TraumaticHeadacheScalpTime FactorsTreatment OutcomeRupture, SpontaneousPneumocephalusCadaverTissue Plasminogen ActivatorCerebral PalsyIntracranial Arteriovenous MalformationsTissue TransplantationMyelographyCranial Fossa, PosteriorFrontal BoneAphasia, WernickeArachnoiditisCerebral VeinsCalcitonin Gene-Related PeptideSpinal CanalInfratentorial NeoplasmsCystatinsMeningitisIsoindolesPostpartum Hemorrhage