Overview
what it is and why it mattersSpondylolisthesis is anterior translation of one vertebral body relative to the one below it. The most common types are degenerative (disc and facet degeneration allowing slip, typically L4-5 in older women) and isthmic (a stress fracture through the pars interarticularis that allows slip, typically L5-S1 in young athletes). Slip is graded I–IV based on percentage of vertebral body width displaced.
Symptoms range from asymptomatic (found incidentally) to severe low back pain with neurogenic claudication when the slip is causing stenosis of the canal or foramina.
Diagnosis
exam first, imaging secondStanding lateral X-rays with flexion-extension views measure percent slip and assess dynamic instability. MRI defines neural element compression. CT defines the bony anatomy for surgical planning.
Treatment Path
how care progresses at OSIPhysical therapy
Core stabilization to minimize dynamic slip during activity.
Activity modification
Avoiding lumbar extension and high-impact sports in symptomatic isthmic slips.
Lumbar epidural steroid injection
For neurogenic symptoms.
If Surgery Is Truly Needed
rare for most patientsSurgery helps only a small minority of spine patients — usually those with a specific structural problem plus a nerve issue that isn’t getting better with a structured non-operative trial. When that step is genuinely warranted, OSI coordinates it the same way we coordinate every other part of your care: imaging, records, and the handoff are handled for you, so no part of the process falls on your shoulders.
Emergency. Bilateral leg weakness, saddle numbness, or loss of bladder or bowel control is a surgical emergency — go to the nearest emergency department rather than waiting for a clinic appointment.
Further Reading
authoritative sourcesExternal patient-education references and related OSI pages for additional background: