SciaticaIntervertebral Disc DisplacementRadiculopathyPiriformis Muscle SyndromeInjections, EpiduralDiskectomyLumbar VertebraeChymopapainLow Back PainSpinal Nerve RootsNerve Compression SyndromesIntervertebral Disc ChemolysisLumbosacral PlexusPain MeasurementIntervertebral DiscPolyradiculopathyFibrocartilageCauda EquinaSpinal CanalPeripheral Nervous System Neoplasms