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

This multicenter study followed 154 skeletally mature adolescents with bilateral pars defects or low-grade spondylolisthesis for a median of 10.5 years to see how the condition behaves after growth stops. Vertebral slip itself rarely worsened (7.1%), but MRI-detected disc degeneration progressed in 30.5%, low back pain worsened in 44.2%, and new neurologic symptoms appeared in 4.5%, so that 56.5% of patients showed progression in at least one domain; L5-level disease, paraspinal sarcopenia, and sedentary behavior independently predicted this overall progression.

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

Why it mattersIt challenges the long-standing teaching that spondylolysis and low-grade spondylolisthesis become mechanically 'burned out' after skeletal maturity, suggesting these patients still need longitudinal monitoring for disc degeneration and pain rather than reassurance based on stable slip alone.

Presenting this at rounds? Start here

• ?The study had no healthy control group and relied on retrospective extraction of symptom data from questionnaires and records; how might recall bias and the absence of a comparator affect confidence in the 44.2% LBP progression rate and the identified risk factors?
• ?If vertebral slip itself rarely progresses but disc degeneration and pain commonly do, should adolescent spondylolysis follow-up protocols shift emphasis away from serial radiographs toward symptom tracking and MRI surveillance, especially in patients with L5-level disease, sarcopenia, or sedentary lifestyles?