Synovial CystCystsBone and BonesPolyradiculopathySpinal DiseasesZygapophyseal JointNerve Compression SyndromesHypoglossal Nerve DiseasesLumbar VertebraeLaminectomySpinal Cord CompressionCyst FluidDecompression, SurgicalHip ContractureRadiculopathyBone RemodelingOdontoid ProcessAtlanto-Axial JointCauda EquinaOvarian CystsBone DensitySpondylolisthesisSpinal Nerve RootsEpidermal CystMagnetic Resonance Imaging