Adjacent Segment Disease After Spinal Fusion
Adjacent segment disease is new pain or nerve symptoms that match wear or narrowing at a spinal level next to a prior fusion. Scans alone do not make the diagnosis. Care starts with matching your symptoms to the exam and imaging, then conservative steps before any talk of more surgery.
Quick Answer: Adjacent Segment Disease
- Clinical diagnosis: symptoms + exam + imaging at the next level must fit together.
- MRI wear next to a fusion is common with age and is not the same as disease that needs treatment.
- Many people improve with therapy, activity changes, medicines, and selected injections.
- Epidural or facet-related injections may ease nerve or joint pain and help confirm the source.
- Another surgery is not automatic; it is considered only after a clear target and failed reasonable care.
- Sudden weakness, bowel/bladder loss, or saddle numbness needs emergency care.
What Adjacent Segment Disease Means
After a spinal fusion, motion stops at the fused level. Extra load can shift to the levels above or below. Over time, those neighboring discs, joints, or ligaments can wear. When that wear causes new, matching symptoms, doctors call it adjacent segment disease [Source] [Source].
Two related terms appear in research. Adjacent segment degeneration means imaging changes. Adjacent segment disease means those changes plus clear clinical problems. Treating a quiet MRI finding without matching pain rarely helps.
Why It Can Happen After Fusion
Fusion changes how the spine shares load. Risk is also tied to how the first surgery was done and to your overall spine health. A large review found higher risk with higher body mass index, “floating” fusion patterns, injury to the facet joint above the construct, and decompression done outside the fused levels [Source]. Age-related wear can also appear next to a fusion even when the surgery itself went well.
Having risk factors does not mean you will have hard symptoms. It means your doctor watches the next levels carefully if new pain appears.
Symptoms That Raise Concern
- New or returning low back pain near the prior surgery level.
- Leg pain, numbness, or weakness in a clear nerve pattern.
- Pain with standing or walking that eases when you sit or lean forward (can overlap with stenosis).
- Symptoms that start months or years after fusion, not only in the first healing weeks.
Early post-op pain, muscle healing, and scar discomfort are different problems. Timing and the exam help sort them out. See also our page on buttock pain after lumbar fusion.
How Doctors Diagnose Adjacent Segment Disease
Diagnosis is a three-part match: your story, a focused exam, and imaging that shows a plausible target at the adjacent level. X-rays may show alignment or instability. MRI shows discs, nerves, and joints. Prior operative reports help explain hardware and levels.
Other sources must be considered. Hip arthritis, sacroiliac joint pain, and residual problems inside the fused zone can mimic adjacent segment disease. When needed, diagnostic injections help separate these sources. Nerve studies (EMG/NCS), if needed, are referred out; SpinePain Solutions does not perform them in office.
Care Options Before Another Surgery
Most care plans start without immediate re-operation.
- Activity changes: keep moving, but reduce positions that spike symptoms.
- Physical therapy: core and hip strength, walking tolerance, and posture work after surgical clearance.
- Medicines: short courses of anti-inflammatory medicines or nerve-pain medicines when appropriate and safe for you.
- Partner care: chiropractic care and other movement clinicians can work with your surgical and pain team when the fusion is stable.
Epidural steroid injections may help when nerve root irritation fits. Facet joint or medial branch procedures may help when the next-level joints are the driver; see facet joint syndrome and radiofrequency ablation. Response varies. Injections are not a lasting fix for wear.
Dr. Amit Sharma & our minimally invasive pain & spine team.
When More Surgery Is Discussed
Further surgery may be discussed when pain or neurologic limits stay high despite reasonable non-surgical care, and imaging plus exam point to a clear adjacent target. Options depend on the anatomy: decompression alone, extension of fusion, or other techniques your spine surgeon recommends. Instability patterns are covered on our spinal instability page. Stenosis at the next level is discussed under spinal stenosis and spinal stenosis treatment.
Re-operation has its own risks. The goal of a careful workup is to avoid operating on the wrong target.
Adjacent Segment Disease Care at SpinePain Solutions
At SpinePain Solutions, Dr. Amit Sharma, Chief, Division of Pain Medicine at Good Samaritan University Hospital, evaluates post-fusion pain at our Bay Shore, Commack and Farmingdale offices (see office locations). He focuses on matching symptoms to a safe, stepwise plan. When injections are appropriate, they are image-guided. Call 631-310-0000.
Frequently Asked Questions
What is adjacent segment disease?
Adjacent segment disease means new, bothersome symptoms that match wear or narrowing at a spinal level next to a prior fusion. Imaging alone is not enough. Your doctor looks for a clear match between your story, exam, and imaging.
When is new pain after fusion an emergency?
Call 911 or go to the ER for sudden severe weakness, new loss of bladder or bowel control, saddle numbness, high fever with back pain, or trauma with severe pain. This page is about planned evaluation, not emergencies.
Is every MRI change next to a fusion called adjacent segment disease?
No. Many adults have disc or joint wear on MRI whether or not they had surgery. Adjacent segment disease is a clinical diagnosis. Degeneration on a scan without matching symptoms is not treated the same way.
Do most people with adjacent segment disease need another surgery?
No. Many people are managed with activity changes, physical therapy, medicines, and carefully chosen injections when they fit. Surgery is considered when symptoms stay hard to manage and a clear target is found.
How can injections help after fusion?
Epidural steroid injections may be used when nerve irritation fits the picture. Facet or medial branch blocks may be used when joint pain from the next level is suspected. These steps can ease symptoms and also help confirm the pain source.
What raises the chance of adjacent segment problems after fusion?
Research links higher body weight, certain fusion patterns, injury to the facet joint above the fusion, and decompression outside the fused levels with higher risk. Not every risk factor applies to every person.
Can physical therapy or a chiropractor still help after fusion?
Yes, when cleared by your surgeon and pain doctor. Movement-based care and chiropractic care can be partners in a plan that protects the fusion and builds strength. Tell every clinician about your prior surgery.
How does SpinePain Solutions evaluate this problem?
Dr. Amit Sharma reviews your surgery history, exam, and imaging. Care may include guided injections when appropriate. EMG or nerve studies, if needed, are referred out. Call 631-310-0000 to discuss next steps.
Dr. Amit Sharma & our minimally invasive pain & spine team.
Medical References
- Park P et al. Adjacent segment disease after lumbar or lumbosacral fusion: review of the literature. Spine (Phila Pa 1976). 2004. PMID 15534420.
- Hilibrand AS et al. Adjacent segment degeneration and adjacent segment disease: the consequences of spinal fusion?. Spine J. 2004. PMID 15541666.
- Mesregah MK et al. Demographic, clinical, and operative risk factors associated with postoperative adjacent segment disease in patients undergoing lumbar spine fusions: a systematic review and meta-analysis. Spine J. 2022. PMID 34896610.
- Katz JN et al. Diagnosis and Management of Lumbar Spinal Stenosis: A Review. JAMA. 2022. PMID 35503342.
