Subarachnoid HemorrhageSubarachnoid SpaceVasospasm, IntracranialIntracranial AneurysmAneurysm, RupturedCerebral AngiographyBasilar ArteryTomography, X-Ray ComputedSubarachnoid Hemorrhage, TraumaticPancreatic NeoplasmsCisterna MagnaSpinal PunctureHydrocephalusArachnoidNeoplasmsCerebral ArteriesRupture, SpontaneousNeoplasms, Cystic, Mucinous, and SerousGlasgow Outcome ScaleIntracranial PressureAnesthesia, SpinalCerebral HemorrhageIschemic Attack, TransientSurgical InstrumentsSkin NeoplasmsCerebrovascular CirculationCerebrospinal FluidNeoplasms, Multiple PrimaryArachnoiditisNimodipineVentriculostomyMeningesBrain IschemiaNeurosurgical ProceduresEmbolization, TherapeuticAngiography, Digital SubtractionCerebral VentriculographyTreatment OutcomeHematoma, SubduralKidney NeoplasmsNeoplasms, Second PrimaryMagnetic Resonance ImagingCraniotomyRetrospective StudiesPregnatrienesTime FactorsBrainAdenocarcinoma, MucinousThyroid NeoplasmsVertebral ArteryMyeloproliferative DisordersGlasgow Coma ScaleCerebral InfarctionHeadacheProspective StudiesCerebral VentriclesMeningeal NeoplasmsDura MaterDNA, NeoplasmImmunohistochemistryLung NeoplasmsParotid NeoplasmsCystadenomaNeoplasms, Connective and Soft TissueNeoplasms, Plasma CellFatal OutcomeVentriculoperitoneal ShuntAppendiceal NeoplasmsVertebral Artery DissectionLiver NeoplasmsCerebrospinal Fluid PressureCystadenoma, MucinousNeurosurgeryOvarian NeoplasmsHeadache Disorders, PrimaryEndocrine Gland NeoplasmsDogsCerebral AqueductAnesthesia, ObstetricalGastrointestinal NeoplasmsCarcinoma, Pancreatic DuctalDisease Models, AnimalCerebrovascular DisordersNeoplasms, ExperimentalPrognosisFollow-Up StudiesNeoplasms, Vascular TissueEye NeoplasmsNose NeoplasmsIncidenceIntracranial HypertensionSalivary Gland NeoplasmsInjections, SpinalNeoplasms, Radiation-InducedConsciousness DisordersAdenocarcinoma, PapillaryCortical Spreading DepressionSpinal Cord NeoplasmsCarcinoma, PapillaryCerebrospinal Fluid Shunts