Spondylolysis is a defect in the pars interarticularis of a vertebra. The great majority of cases occur in the lowest of the lumbar vertebrae (L5), but spondylolysis may also occur in the other lumbar vertebrae, as well as in the thoracic vertebrae.
Spondylolysis occurs in three to six percent of the population.
Spondylolysis also runs in families and is more prevalent in some populations, suggesting a hereditary component such as a tendency toward thin vertebral bone.
Spondylolysis is the most common cause of spondylolisthesis in pediatric patients. In the older population, degenerative disc disease commonly leads to spondylolisthesis without spondylolysis; in these instances, the spinal canal gets narrowed because the spinolaminar arch at one level slides forward on the lower level effectively flattening the canal. The hereditary factor mentioned above is quite notable, since the frequency of spondylolisthesis in Eskimos is 30–50%.
New spondylolysis therapy study findings have been reported by researchers at City Hospital, Department of Orthopedic Surgery.(Report)
Mar 25, 2009; New research, 'Cervical spondylolysis in a judo player: a case report and biomechanical analysis,' is the subject of a...