Spinal Cord CompressionSpinal OsteophytosisSpondylosisCervical VertebraeLaminectomySpinal Cord DiseasesDecompression, SurgicalSpinal CordSpinal CanalMyelographyDiskectomySpinal NeoplasmsSpinal FusionSpinal Cord InjuriesOssification of Posterior Longitudinal LigamentLordosisSpinal Cord NeoplasmsRadiculopathyElectrodiagnosisLongitudinal LigamentsSpinal StenosisMagnetic Resonance ImagingKyphosisThoracic VertebraeTreatment OutcomeEvoked Potentials, SomatosensoryRecovery of FunctionEpidural NeoplasmsSpinal DiseasesParaplegiaEpidural SpaceHematopoiesis, ExtramedullaryRetrospective StudiesCicatrixPostoperative ComplicationsScheuermann DiseaseAthetosisHematoma, Epidural, SpinalQuadriplegiaFollow-Up StudiesAdenomatous Polyposis Coli ProteinParaparesisGlial Fibrillary Acidic ProteinHyperostosisNeurosurgical ProceduresOsteochondromaRheumatic NoduleOdontoid ProcessEpidural AbscessBalloon EmbolectomyTuberculosis, SpinalSpinal Nerve RootsArachnoid CystsMyelitisBone NeoplasmsSpineParaparesis, Tropical SpasticExostoses, Multiple HereditaryArachnoidDiphosphonatesLigamentum FlavumInjections, SpinalSpinal InjuriesSpinal Cord IschemiaIntervertebral Disc DisplacementTomography, X-Ray ComputedSpinal FracturesHemangiomaData CompressionLumbar VertebraeFractures, SpontaneousNerve Compression SyndromesMotor NeuronsSpinal NervesSpondylitisDura MaterSpondylolysisTime Factors