Cerebrospinal FluidCerebrospinal Fluid ProteinsCerebrospinal Fluid RhinorrheaCerebrospinal Fluid PressureMeningitisCerebrospinal Fluid ShuntsSpinal PunctureSensitivity and SpecificityMeningitis, BacterialMeningitis, ViralCerebrospinal Fluid OtorrheaDelayed DiagnosisTuberculosis, MeningealHydrocephalusEarly DiagnosisMeningitis, AsepticPrenatal DiagnosisMeningitis, PneumococcalMeningoencephalitisChoroid PlexusRetrospective StudiesSubarachnoid SpaceMagnetic Resonance ImagingNeurosyphilisDiagnosisCisterna MagnaBrainIntracranial PressureTomography, X-Ray ComputedArachnoidCerebral VentriclesBiological MarkersCentral Nervous System DiseasesMultiple SclerosisNervous System DiseasesTime FactorsPolymerase Chain ReactionInfant, NewbornDiagnostic ErrorsOligoclonal BandsMeningitis, FungalBrain DiseasesBlood-Brain BarrierPredictive Value of TestsReproducibility of ResultsMeningesHydroxyindoleacetic AcidCentral Nervous System InfectionsPneumoencephalographyEnzyme-Linked Immunosorbent AssayEncephalitisVentriculoperitoneal ShuntProspective StudiesLyme NeuroborreliosisFatal OutcomeTreatment OutcomeBiopsyHomovanillic AcidVentriculostomyAlzheimer DiseaseMeningitis, HaemophilusNeurocysticercosisEncephalitis, ViralMeningeal NeoplasmsLeukocytosisFollow-Up StudiesPrognosisMeningitis, MeningococcalNursing DiagnosisMeningitis, CryptococcalDiagnosis, Computer-AssistedInjections, SpinalCase-Control StudiesDura MaterRisk FactorsCentral Nervous System Viral DiseasesPregnancyPreimplantation DiagnosisCohort Studiestau ProteinsAcute DiseaseSubarachnoid HemorrhageIntracranial HypotensionInjections, IntraventricularEvaluation Studies as TopicFalse Positive ReactionsHeadacheBrain NeoplasmsEnterovirus InfectionsImmunoglobulin GAge FactorsAmyloid beta-PeptidesHydrocephalus, Normal PressureCerebral VentriculographyROC CurveReagent Kits, DiagnosticAIDS Dementia ComplexEpendymaMyelographySeverity of Illness Index