Spinal StenosisInjections, Intra-ArticularGlucocorticoidsReceptors, GlucocorticoidLumbar VertebraeSpinal CordDecompression, SurgicalSpinal CanalLaminectomySpondylolisthesisInjections, EpiduralCarotid StenosisAortic Valve StenosisSpinal Cord InjuriesRadiculopathyLigamentum FlavumInjectionsDexamethasoneSpinal FusionLumbosacral RegionCoronary StenosisIntervertebral Disc DisplacementSpinal DiseasesSciaticaTracheal StenosisSpinal Nerve RootsSpinal Cord CompressionPolyradiculopathyLow Back PainMyelographyInjections, SpinalTreatment OutcomePain MeasurementSteroidsIntermittent ClaudicationSpondylosisPyloric StenosisMitral Valve StenosisDisability EvaluationConstriction, PathologicPulmonary Valve StenosisAnesthetics, LocalBack PainMifepristoneCervical VertebraeMagnetic Resonance ImagingOrthopedic ProceduresFailed Back Surgery SyndromeSacrumNeurosurgical ProceduresEpidural SpaceTriamcinoloneBetamethasoneCauda EquinaProstheses and ImplantsProspective StudiesFollow-Up StudiesSpineTissue AdhesionsTime FactorsSpinal NervesCorticosteroneSpinal Cord DiseasesFluoroscopyRetrospective StudiesAnesthesia, SpinalSeverity of Illness IndexDura MaterSurgical Procedures, Minimally InvasiveTriamcinolone AcetonideTomography, X-Ray ComputedPainChronic PainSaline Solution, HypertonicSpinal Cord NeoplasmsHydrocortisonePostoperative ComplicationsInternal FixatorsThoracic VertebraeLidocaineAnti-Inflammatory AgentsInjections, IntravenousIntervertebral Disc DegenerationSpinal NeoplasmsNerve Compression SyndromesInjections, IntramuscularRecovery of FunctionRenal Artery ObstructionOrthopedic Fixation DevicesRats, Sprague-DawleyAortic Stenosis, SubvalvularDiskectomyAchondroplasiaOsteoarthritis, SpineReceptors, SteroidPost-Dural Puncture HeadacheReceptors, MineralocorticoidHormone AntagonistsDiagnostic Techniques, NeurologicalAortic Stenosis, Supravalvular