Spondylosis can occur in the cervical spine (neck), thoracic spine (upper and mid back), or lumbar spine (low back). Lumbar spondylosis and cervical spondylosis are the most common. Thoracic spondylosis frequently does not cause symptoms. Lumbosacral spondylosis is spondylosis that affects both the lumbar spine and the sacral spine (below the lumbar spine, in the midline between the buttocks). Multilevel spondylosis means that these changes affect multiple vertebrae in the spine.