Synovial CystCystsSyndromePolyradiculopathySpinal DiseasesZygapophyseal JointNerve Compression SyndromesHypoglossal Nerve DiseasesLaminectomyLumbar VertebraeSpinal Cord CompressionCyst FluidDecompression, SurgicalRadiculopathyHip ContractureOdontoid ProcessAtlanto-Axial JointCauda EquinaOvarian CystsSpinal Nerve RootsSpondylolisthesisMagnetic Resonance ImagingEpidermal Cyst