Synovial CystCystsPolyradiculopathySpinal DiseasesZygapophyseal JointNerve Compression SyndromesHypoglossal Nerve DiseasesLumbar VertebraeLaminectomySpinal Cord CompressionCyst FluidRadiculopathyDecompression, SurgicalHip ContractureInjectionsOdontoid ProcessAtlanto-Axial JointCauda EquinaOvarian CystsSpinal Nerve RootsSpondylolisthesisEpidermal CystMagnetic Resonance Imaging