Dura MaterCerebral HemorrhageSkullSkull BaseSubarachnoid HemorrhageCerebral InfarctionHemorrhageParietal BonePia MaterCerebral ArteriesCranial SuturesCerebral Amyloid AngiopathyCerebrovascular DisordersIntracranial HemorrhagesArachnoidIntracranial Hemorrhage, HypertensiveMeningeal ArteriesTomography, X-Ray ComputedSkull NeoplasmsCapillary FragilitySkull Base NeoplasmsCraniotomyBrainMeningesCerebral AngiographyCerebral Amyloid Angiopathy, FamilialCerebrovascular CirculationMiddle Cerebral ArterySkull FracturesAmyloidosisBrain IschemiaSumatriptanMagnetic Resonance ImagingIntracranial Embolism and ThrombosisFatal OutcomeLaminectomySubarachnoid SpaceCraniosynostosesTrigeminal NerveStrokeHematomaIntracranial AneurysmCerebrospinal Fluid RhinorrheaEpidural SpaceRetinal HemorrhageHematoma, SubduralMeningiomaTime FactorsHemangioma, Cavernous, Central Nervous SystemCerebral Hemorrhage, TraumaticJapanNeurosurgical ProceduresMeningeal NeoplasmsTreatment OutcomeTissue Plasminogen ActivatorIntracranial Arteriovenous MalformationsCreutzfeldt-Jakob SyndromeCerebral PalsyAphasia, WernickeScalpForamen MagnumCystatinsRupture, SpontaneousPostpartum HemorrhagePneumocephalusIschemic Attack, TransientBrain EdemaGastrointestinal HemorrhageRetrospective StudiesFrontal BoneTissue TransplantationRisk FactorsSpinal CanalMeningitisHypertensionStreptococcus anginosusPostoperative ComplicationsAcute DiseaseCalcitonin Gene-Related PeptideCerebral VeinsCadaverFibrinolytic AgentsVitreous HemorrhageIsoindolesNeurologic ExaminationEye HemorrhageProspective StudiesHematoma, Epidural, CranialTrigeminal GanglionAutonomic DysreflexiaMoyamoya DiseaseInfarction, Middle Cerebral ArteryVasospasm, IntracranialOccipital BoneTrigeminal Nucleus, SpinalMigraine DisordersLongitudinal LigamentsFollow-Up StudiesPolytetrafluoroethyleneLigamentum Flavum