Spondylolysis

Spondylolysis is characterized by a defective (separated) pars interarticularis, the bony bridge joining the superior and inferior articular processes of the vertebrae. The pars defect usually results from congenital dysplasia (patients aged <20 years), degenerative disease (patients aged >40 years), and/or trauma (e.g., high-impact repetitive sports such as gymnastics or weight lifting).

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