Synovial CystCystsPolyradiculopathySpinal DiseasesZygapophyseal JointNerve Compression SyndromesHypoglossal Nerve DiseasesLaminectomyLumbar VertebraeGangliaSpinal Cord CompressionCyst FluidDecompression, SurgicalRadiculopathyHip ContractureOdontoid ProcessAtlanto-Axial JointRetinal Ganglion CellsCauda EquinaGanglia, SpinalOvarian CystsBasal GangliaSpinal Nerve RootsSpondylolisthesisMagnetic Resonance ImagingEpidermal CystGanglia, SympatheticGanglia, AutonomicTrigeminal Ganglion