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