Spinal StenosisSpondylolisthesisInjections, EpiduralEpendymaSpinal CanalSpinal CordLumbar VertebraeSyringomyeliaSpondylolysisSpinal FusionDecompression, SurgicalHaversian SystemLidocaineLaminectomyAnesthetics, LocalSpinal Cord InjuriesSacrumLumbosacral RegionRadiculopathySpinal DiseasesIntervertebral Disc DisplacementZygapophyseal JointLordosisInternal FixatorsLow Back PainCarotid StenosisAxisSemicircular CanalsBone ScrewsAortic Valve StenosisSciaticaSpineBack PainLigamentum FlavumTreatment OutcomeDisability EvaluationSpinal Nerve RootsIntervertebral Disc DegenerationOrthopedic Fixation DevicesIntervertebral DiscEar CanalSpinal Cord CompressionSpondylosisPain MeasurementCoronary StenosisCervical VertebraeOrthopedic ProceduresMagnetic Resonance ImagingSpinal CurvaturesNeurosurgical ProceduresTracheal StenosisDura MaterSurgical Procedures, Minimally InvasivePostoperative ComplicationsRetrospective StudiesFollow-Up StudiesOsteoarthritis, SpineMyelographyPolyradiculopathyTomography, X-Ray ComputedRoot Canal PreparationImmunohistochemistryScoliosisIliumIntermittent ClaudicationProstheses and ImplantsSpina Bifida OccultaPyloric StenosisSeverity of Illness IndexJoint InstabilityMitral Valve StenosisConstriction, PathologicSpinal FracturesPulmonary Valve StenosisProspective StudiesSynovial CystThoracic VertebraeKyphosisInjections, SpinalSteroidsBone TransplantationPelvisFailed Back Surgery SyndromeEpidural SpaceCauda Equina