Spondylolisthesis means one vertebra has slipped forward on the one below. Most are stable. Many cause no symptoms at all.
What is spondylolisthesis?
It is graded 1 to 4 by how far the bone has slipped. Grade 1 and 2 are by far the most common.
There are two main types. Degenerative slips come from the facet joints and disc breaking down in older adults. Isthmic slips come from a defect in the pars interarticularis (a thin bridge of bone at the back of the spine). That defect often dates back to sports in the teen years.
What are the symptoms of spondylolisthesis?
- Low back pain worse with standing and walking.
- Relief when sitting or bending forward.
- Leg symptoms if the slip narrows the openings where nerves exit.
- Tight hamstrings, especially in the isthmic type.
How is spondylolisthesis treated?
- Epidural injection when nerve roots are irritated.
- Medial branch block and ablation when the facet joints are part of the pain.
- Physical therapy that stresses bending forward (flexion) and core stability.
- Referral to a surgeon if the slip gets worse or there is significant neurological compromise.
To get checked, call us or request an appointment.
What usually gets missed
The grade of slip is a poor guide to symptoms. The usual mistake is treating the number instead of the patient. Grade 1 slips are very common and often cause no symptoms for decades.
The more useful split is isthmic versus degenerative. Isthmic slips follow a pars defect, often from teen sports. They tend to be stable. Degenerative slips come from the facet joints and disc breaking down in older adults. They are more often associated with stenosis (narrowing around the nerves) and leg symptoms.
Does spondylolisthesis get worse over time?
Most low-grade slips do not get much worse in adulthood. Repeat scans to watch for change rarely tell us anything unless there are new symptoms.
Treatment targets whatever is actually causing the pain. Usually that is the facet joints at the slipped level, or an irritated nerve root where the slip has narrowed the exit. Surgery is saved for a slip that keeps getting worse or significant neurological compromise.
When this becomes urgent
New or worsening leg weakness, saddle numbness, or bladder and bowel change needs emergency assessment. In teens, a sudden jump in back pain with tight hamstrings needs prompt imaging to rule out a worsening slip.
What causes spondylolisthesis?
Spondylolisthesis describes one vertebra sitting forward on the one below. In younger patients it usually follows a stress fracture of the bony bridge behind the joint. In older patients it is degenerative. It happens as the facet joints and disc lose their hold. Grades run from I to IV by how far it slips. The grade is only loosely linked to symptoms.
What it gets confused with
The slip is often found by chance and then blamed for pain that is coming from somewhere else. What matters is two things. First, is the segment unstable? X-rays taken bending forward and back (flexion and extension views) answer that, not a single image. Second, is a nerve root being crowded? The exam answers that.
How we approach it here
The first task is to name the body part causing the pain, not just the symptom. That means an exam built to bring on and relieve your pain. It means reviewing any scans for what they do and do not show. And when the picture points somewhere specific, it means a targeted block to confirm it. Treatment follows the answer instead of coming before it.
Common questions
Will the slip get worse?
Most low-grade slips stay stable for decades. We watch for worsening rather than assume it. Flexion-extension views answer the stability question directly.
Is surgery inevitable?
No. Many are treated without it. Surgery is considered for an unstable spine with worsening symptoms or significant nerve compression. It is not done for the measurement alone.
Is spondylolisthesis a serious condition?
Usually not. Grade 1 and 2 slips are by far the most common, and grade 1 slips often cause no symptoms for decades. Most low-grade slips do not get much worse in adulthood. It becomes urgent when there is new or worsening leg weakness, numbness in the saddle area, or a change in bladder or bowel control. Those signs need emergency assessment.
What does pain from spondylolisthesis feel like?
Most people feel low back pain that gets worse with standing and walking and eases when they sit or bend forward. If the slip narrows the openings where nerves leave the spine, symptoms can travel into the legs. Tight hamstrings are common, especially in the isthmic type that starts with a pars defect, often from sports in the teenage years.
What is the best treatment for spondylolisthesis?
The best treatment targets whatever is actually causing the pain, not the grade on the X-ray. When the facet joints at the slipped level are the source, a medial branch block and ablation treat them. When a nerve root is irritated, an epidural injection does. Physical therapy builds flexion and core stability. Surgery is reserved for a slip that progresses or significant nerve compromise.
Sources
- Bydon M et al. Degenerative Lumbar Spondylolisthesis: Definition, Natural History, Conservative Management, and Surgical Treatment. Neurosurgery clinics of North America, 2019. PubMed 31078230
- Mohile NV et al. Spondylolysis and Isthmic Spondylolisthesis: A Guide to Diagnosis and Management. Journal of the American Board of Family Medicine : JABFM, 2022. PubMed 36526328
- Gadjradj PS et al. Decompression alone versus decompression with fusion in patients with lumbar spinal stenosis with degenerative spondylolisthesis: a systematic review and meta-analysis. European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2023. PubMed 36609887
- Chan AK et al. Summary of Guidelines for the Treatment of Lumbar Spondylolisthesis. Neurosurgery clinics of North America, 2019. PubMed 31078236
Hurt in an accident? Start here.
You do not need a lawyer, a police report or a referral to be seen. Bring your symptoms and we will work out the rest.
Monday–Friday, 8:00 a.m. – 4:00 p.m. Same-day appointments are often available for new accident and injury patients.