Natural Progression Patterns of Lumbar Spondylolysis and Low-grade Spondylolisthesis in Late Adolescents

This multicenter cohort followed 154 adolescents who had bilateral pars defects or low-grade spondylolisthesis for a median of 10.5 years after they reached skeletal maturity, tracking slip progression, disc degeneration, back pain, and neurologic symptoms with no intervention performed. Actual vertebral slippage progressed in only 7.1% of patients, but 30.5% developed worsening disc degeneration on MRI, 44.2% had clinically significant worsening of low back pain, and 4.5% developed new neurologic symptoms, giving an overall combined progression rate of 56.5%; L5-level lesions, sarcopenia, and sedentary behavior were independently associated with this combined progression.

AI summary · from the full text · reviewed by Pukhraj Gaheer, Medical Student, Queen's University before publishing

Why it mattersIt challenges the long-held belief that spondylolysis/low-grade spondylolisthesis is inert after skeletal maturity, suggesting that most of these patients still need long-term monitoring for pain and disc degeneration even though frank slippage rarely worsens.

Presenting this at rounds? Start here

• ?The study dichotomized continuous variables like BMI and sitting time at the median for convenience, and treated any surgery during follow-up as automatically positive for all four progression endpoints; how might these methodological choices have inflated the reported 56.5% multidimensional progression rate?
• ?Given that slip progression itself was rare (7.1%) and no risk factors predicted isolated IVDD or LBP progression, how should this natural history data change how you counsel a skeletally mature adolescent found incidentally to have low-grade spondylolisthesis?