SPONDYLOLYSIS - BILATERAL L5: Contributed by: ..
Bilateral L5 spondylolysis without spondylolisthesis : ..
Normally the inferior articular facets of the fifth lumbar vertebra prevent the body of this vertebra from being displaced anteriorly on the sacrum. Bilateral defects in the pars interarticularis make the neural arch a loose fragment, causing a loss in osseous continuity between the inferior articular facets and the body of the fifth lumbar vertebra, and allowing the body of the vertebra to gradually become displaced anteriorly. In addition, as the slip progresses, the foramen elongates and flattens, resulting in a foraminal stenosis. When the loose neural arch is removed, the reparative attempts by bone are evidenced in the hypertrophy of the cephalad pars stump. This overgrowth or elongation results in a "hook" that may rest directly on the nerve roots. This "hook" must be removed if the individual is to be relieved of radicular symptoms.
Bilateral L5 Spondylolysis With Grade 1 Spondylolisthesis
Most spondylolytic defects and cases of Spondylolisthesis are congenital. The prevalence of Spondylolisthesis in the general population is about 5% and is about equal in men and women. Spondylolysis and Spondylolisthesis most frequently involve L5, although L4 can also be affected and, rarely, more proximal levels.
Bilateral Pars Defect With Grade 2 ..
Grade 1 and 2 can be managed conservatively, while grade 3 and 4 require surgical intervention.
Am häufigsten ist das Gleiten des fünften Lendenwirbels gegenüber dem ersten Wirbel des Kreuzbeinmassivs (L5/S1).
L5 Spondylolysis with grade 1 Spondylolisthesis at L5 …
The most common level it is found is at L5-S1, although spondylolisthesis can occur at L4-5 and rarely at a higher level.
Adult isthmic spondylolisthesis most commonly occurs at the L5–S1 level of the lumbar spine.
The process may be unilateral or bilateral.
Wenn ein Wirbel aus seiner eigentlichen Position rutscht, spricht der Arzt von einer Spondylolisthesis oder auch Wirbelgleiten.
Au niveau L4-L5-S1, les deux stabilités axiale (verticale) 2 - Cloward RB : Spondylolisthesis : Treatment by laminectomy and posterior interbody fusion.