Adoloscents Back Pain

Posted by e-Medical PPT Thursday, July 8, 2010
Spondylolysis is a defect of a vertebra. The most of cases occur in the lowest of the lumbar vertebrae (L4-L5), but spondylolysis may also occur in the other lumbar vertebrae, as well as in the thoracic vertebrae.
It is typically caused by stress fracture of the bone, and is especially common in adolescents who are involving in activities such as tennis, diving, martial arts and gymnastics.It has been thought that the pars interarticularis is especially vulnerable when the spine is in an extended position, and a force suddenly presses the vertebrae together, such as when landing on one's feet after a hop. This pressure acts like a nut-cracker on the pars interarticularis and can fracture it in susceptible individuals.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 narrows because the spino-laminar arch at one level slides forward on the lower level effectively flattening the canal.

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