SciaticaIntervertebral Disc DisplacementRadiculopathyPostoperative ComplicationsPiriformis Muscle SyndromeLumbar VertebraeInjections, EpiduralDiskectomyChymopapainLow Back PainTreatment OutcomeSpinal Nerve RootsNerve Compression SyndromesIntervertebral Disc ChemolysisPain MeasurementLumbosacral PlexusPolyradiculopathyIntervertebral DiscIntraoperative ComplicationsSpinal CanalCauda EquinaFibrocartilageSpinal DiseasesProspective StudiesPeripheral Nervous System NeoplasmsFollow-Up Studies