What is a PARS defect?

Dr. Abid Qureshi of Muir Orthopaedic Specialists describes a PARS defect.

Question: What is a PARS defect?

Answer: A PARS defect is a common cause of lower back pain in young athletes. The PARS interarticularis, or PARS, is located between the pedicle and the lamina of the vertebrae which make up the spine. The PARS is where the bone is the weakest and susceptible to injury. Injuries here are usually caused by excessive and repetitive strain, mostly hyperextension leading to a stress fracture or even a complete fracture. PARS fractures are characterized by pain and stiffness in the lower back that worsens with activity.

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