SciaticaIntervertebral Disc DisplacementRadiculopathyPiriformis Muscle SyndromeInjections, EpiduralDiskectomyLumbar VertebraeChymopapainLow Back PainSpinal Nerve RootsNerve Compression SyndromesIntervertebral Disc ChemolysisLumbosacral PlexusIntervertebral DiscPain MeasurementPolyradiculopathyFibrocartilageCauda EquinaSpinal CanalPeripheral Nervous System Neoplasms