Synovial CystCystsPolyradiculopathySpinal DiseasesZygapophyseal JointNerve Compression SyndromesHypoglossal Nerve DiseasesLaminectomyLumbar VertebraeSpinal Cord CompressionCyst FluidDecompression, SurgicalHip ContractureRadiculopathyOdontoid ProcessAtlanto-Axial JointCauda EquinaOvarian CystsSpinal Nerve RootsSpondylolisthesisEpidermal CystMagnetic Resonance Imaging