Ligamentum FlavumOssification, HeterotopicSpinal Cord CompressionLaminectomyOssification of Posterior Longitudinal LigamentLigamentsLongitudinal LigamentsSpinal Cord DiseasesSpinal StenosisCervical VertebraeThoracic VertebraeRadiculopathyEpidural SpaceSpinal DiseasesDecompression, SurgicalBrevibacteriumLumbar VertebraeSpinal CanalHematomaBrevibacterium flavumMyelographyElastic TissueIntervertebral DiscLumbosacral RegionCystsThalictrumSpinal OsteophytosisAnesthesia, EpiduralParaparesis, Tropical Spastic