RadiculopathyLumbar VertebraeSpinal Nerve RootsInjections, EpiduralLumbosacral RegionLow Back PainIntervertebral Disc DisplacementMagnetic Resonance ImagingCervical VertebraeSpinal StenosisSpinal CanalTotal Disc ReplacementSpondylosisLigamentum FlavumDiskectomySpinal OsteophytosisPost-Traumatic HeadacheElectrodiagnosisIntervertebral DiscEpidural SpaceSciaticaNerve Compression SyndromesBrachial Plexus NeuritisLaminectomyNeck PainForaminotomySynovial CystSpinal Cord CompressionPolyradiculopathyHematoma, Epidural, SpinalSacrum