BrevibacteriumBrevibacterium flavumOssification, HeterotopicThalictrumLaminectomyOssification of Posterior Longitudinal LigamentSpinal Cord CompressionLongitudinal LigamentsThoracic VertebraeLigamentsEpidural SpaceRadiculopathySpinal DiseasesCervical VertebraeCorynebacteriumLumbar VertebraeHematomaSpinal CanalDecompression, SurgicalChorismate MutaseSynovial CystLigamentum FlavumIntervertebral DiscElastic TissueMyelographyLumbosacral RegionSpinal Cord DiseasesCystsAnesthesia, EpiduralOrchidaceaeMagnetic Resonance ImagingTomography, X-Ray ComputedTreatment Outcome