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Spondylolysis is a defect or stress fracture in the pars interarticularis of the vertebral arch. [1] The vast majority of cases occur in the lower lumbar vertebrae (L5), but spondylolysis may also occur in the cervical vertebrae .
Isthmic anterolisthesis is where there is a defect in the pars interarticularis (spondylolysis). [15] It is the most common form of spondylolisthesis; also called spondylolytic spondylolisthesis, it occurs with a reported prevalence of 5–7 percent in the US population.
The pars interarticularis, or pars for short, is the part of a vertebra located between the inferior and superior articular processes of the facet joint. [1] [2] In the transverse plane, it lies between the lamina and pedicle. In other words, in the axial view, it is the bony mass between the facets that is anterior to the lamina and posterior ...
Spondylolisthesis is a condition in which a vertebra in the spine slips out of alignment and puts pressure on the vertebrae below it, according to the Cleveland Clinic.It can occur anywhere in the ...
Spondylolisthesis affects between 4% and 8% of the U.S. population, and the most common form, degenerative spondylolisthesis, can be due to the wear and tear of normal aging, ...
Spondylolisthesis is the forward displacement of a vertebra and retrolisthesis is a posterior displacement of one vertebral body with respect to the adjacent vertebra to a degree less than a dislocation. Spondylolysis, also known as a pars defect, is a defect or fracture at the pars interarticularis of the vertebral arch.
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