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Congenital for Spondylolysis or Spondylolisthesis

In Spondylolisthesis with a significant slip, a step-off at the lumbosacral junction is palpable, motion of the lumbar spine is restricted, and hamstring tightness is evident on straight leg raising. As the vertebral body displaces anteriorly, the individual assumes a lordotic posture above the level of the slip to compensate for the displacement. Adults may have objective signs of nerve root compression, such as motor weakness, reflex change, or sensory deficit. These signs are seldom seen in children.

Repetitive trauma in clinical onset or aggravation of Spondylolisthesis and/or Spondylolysis

MR imaging using parasagittal T2-weighted and axial T1 and T2- weighted images through the area of the pedicle / pars junction may demonstrate bone marrow oedema present in active spondylolysis. For the demonstration of an interruption in the pars interarticularis sagittal T1 and proton density studies which show better differentiation between cortical and medullary bone are more useful.

spondylolisthesis: when one vertebra slips forward on another.

We treat more than 600 patients with spondylolisthesis each year.

Spondylolisthesis by its nature causes instability of the spine. This instability has an adverse effect on the disc immediately below the displaced vertebra and can influence the development of degenerative changes to a moderate to severe degree.

Spondylolisthesis has been classified into grades I, II, III, IV and V depending on the severity of the displacement of the vertebra above on the vertebra below. In severe cases involving the lumbar spine, cauda equina syndrome can occur.

Spondylolysis and Spondylolisthesis of the Lumbar …

Associated with a congenital abnormality of the upper sacrum or the neural arch of L5. There is usually no defect of the pars.

For posterior spinal decompression surgery to cause Spondylolysis or Spondylolisthesis, the surgery may occur any time before clinical onset of either condition.

Posterior spinal decompression surgery, at the level of the involved vertebra, prior to clinical onset or aggravation of Spondylolysis or Spondylolisthesis

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Spondylolysis and spondylolisthesis - Mayfield Clinic

Posterior spinal fusion means a surgical procedure involving immobilization of the posterior elements of two or more vertebrae by the use of bone grafting, in the absence of immobilization of the lateral elements, of the same vertebrae. This type of surgery produces an abnormality in the functional loading of the adjacent vertebrae, and can result in either Spondylolysis or Spondylolisthesis.

Spondylolysis and Spondylolisthesis - London Pain Clinic

In patients with a pars defect there is a high incidence of spina bifida occulta, almost 13 fold. The spinal defect does not necessarily occur at the level of the pars defect. The hypoplastic and asymmetric facets that occur with spina bifida occulta are thought to increase the stress at the pars interarticularis thus predisposing to a defect.

Spondylolytic Spondylolisthesis

In the white population there is a 5 -7% prevalence of pars defects with a male to female ratio of 2 to 1. In the black populations of South Africa there is a 2.4% incidence of a pars defect. In Alaskan Eskimos there is a 28-40% incidence of pars defects (? carrying upright in a papoose puts increased strain on the pars interarticularis).

Adult Isthmic Spondylolisthesis - Spine - Orthobullets

Approximately 90% of all spondylolytic spondylolistheses involve the 5th lumbar vertebra. 5% at L4, 3% at L1 L2 and L3, and 2% at C5 C6 and C7.

SPONDYLOLYSIS - BILATERAL L5: ..

For posterior spinal decompression surgery to aggravate Spondylolysis or Spondylolisthesis, signs/symptoms of Spondylolysis or Spondylolisthesis should occur within 10 years of the surgery.

Bilateral L5 spondylolysis without spondylolisthesis : ..

Spondylolysis is an interruption of the pars interarticularis, this can either be unilateral or bilateral. Spondylolisthesis: an anterior displacement of a vertebral body in relationship to the segment immediately below, this can occur with or without a defect in the pars interarticularis.

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