Cerebral VentriculitisIntracranial AneurysmAneurysmCerebral VentriclesCerebral AngiographyAneurysm, RupturedEncephalitisHydrocephalusCerebral ArteriesEmbolization, TherapeuticVentriculostomySubarachnoid HemorrhageSpiruridaAneurysm, InfectedCerebral VentriculographyCerebrospinal Fluid ShuntsSurgical InstrumentsCerebral InfarctionVentriculoperitoneal ShuntMeningitisCerebrovascular CirculationAortic AneurysmMeningitis, FungalAngiography, Digital SubtractionMiddle Cerebral ArteryCerebral PalsyBrain AbscessMeningitis, BacterialAortic Aneurysm, ThoracicHeart AneurysmCerebrospinal FluidTomography, X-Ray ComputedEndovascular ProceduresTuberculosis, MeningealAneurysm, DissectingBlood Flow VelocityAnterior Cerebral ArteryInjections, IntraventricularPlatinumCerebral VeinsBrainNeurosurgical Procedures