In spondylolisthesis, a vertebra (bone of the spine) slips forward over the one below it. The condition usually affects vertebrae in the lower back. It may be present from birth or develop during growth in mid-to-late childhood.
However, most cases occur in adults and result from a degenerative joint disorder, such as osteoarthritis , or more rarely from a spinal injury, such as a stress fracture of the spine.
In most cases, there are no symptoms, although some people have pain, stiffness, or sciatica.
Treatment may include medication and special exercises or physical therapy. In severe cases, surgery may be needed.