LaminectomyLumbar VertebraeParaspinal MusclesLumbosacral RegionSpinal Cord CompressionSpinal NeoplasmsEpidural AbscessDecompression, SurgicalSpineSpinal StenosisThoracic VertebraeCervical VertebraeBackLigamentum FlavumSpinal Nerve RootsSpinal DiseasesSacrumSpinal FusionEpidural SpaceArachnoiditisDura MaterSpinal Canal