Spondylolysis

Spondylolysis
Arrows show break in pars interarticularis at L5. X-Ray of lumbar spine, lateral projection, in an 11-year-old boy
SpecialtyOrthopedics
Diagnostic methodX-ray, CT scan, MRI

Spondylolysis also known as a pars defect or pars fracture, is a defect or stress fracture in the pars interarticularis of the vertebral arch. The vast majority of cases occur in the lower lumbar vertebrae (L5), but spondylolysis may also occur in the cervical vertebrae.

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