Many people have evidence of spinal stenosis on an MRI or CT scan but may not have symptoms. When they do occur, they often start gradually and worsen over time. Symptoms vary depending on the location of the stenosis and which nerves are affected.
In the neck (cervical spine)
- Numbness or tingling in a hand, arm, foot or leg
- Weakness in a hand, arm, foot or leg
- Problems with walking and balance
- Neck pain
- In severe cases, bowel or bladder dysfunction (urinary urgency and incontinence)
In the lower back (lumbar spine)
- Numbness or tingling in a foot or leg
- Weakness in a foot or leg
- Pain or cramping in one or both legs when you stand for long periods of time or when you walk, which usually eases when you bend forward or sit
- Back pain
When to see a doctor
See your doctor if you have any of the symptoms listed.
The backbone (spine) runs from your neck to your lower back. The bones of your spine form a spinal canal, which protects your spinal cord (nerves).
Some people are born with a small spinal canal. But most spinal stenosis occurs when something happens to narrow the open space within the spine. Causes of spinal stenosis may include:
- Overgrowth of bone. Wear and tear damage from osteoarthritis on your spinal bones can prompt the formation of bone spurs, which can grow into the spinal canal. Paget's disease, a bone disease that usually affects adults, also can cause bone overgrowth in the spine.
- Herniated disks. The soft cushions that act as shock absorbers between your vertebrae tend to dry out with age. Cracks in a disk's exterior may allow some of the soft inner material to escape and press on the spinal cord or nerves.
- Thickened ligaments. The tough cords that help hold the bones of your spine together can become stiff and thickened over time. These thickened ligaments can bulge into the spinal canal.
- Tumors. Abnormal growths can form inside the spinal cord, within the membranes that cover the spinal cord or in the space between the spinal cord and vertebrae. These are uncommon and identifiable on spine imaging with an MRI or CT.
- Spinal injuries. Car accidents and other trauma can cause dislocations or fractures of one or more vertebrae. Displaced bone from a spinal fracture may damage the contents of the spinal canal. Swelling of nearby tissue immediately after back surgery also can put pressure on the spinal cord or nerves.
Most people with spinal stenosis are over the age of 50. Though degenerative changes can cause spinal stenosis in younger people, other causes need to be considered. These include trauma, congenital spinal deformity such as scoliosis, and a genetic disease affecting bone and muscle development throughout the body. Spinal imaging can differentiate these causes.
Rarely, untreated severe spinal stenosis may progress and cause permanent:
- Balance problems
Aug. 04, 2017
- Spinal stenosis. National Institute of Arthritis and Musculoskeletal and Skin Diseases. https://www.niams.nih.gov/health_info/spinal_stenosis/. Accessed March 7, 2017.
- Goldman L, et al., eds. Mechanical and other lesions of the spine, nerve roots and spinal cord. In: Goldman-Cecil Medicine. 25th ed. Philadelphia, Pa.: Saunders Elsevier; 2016. https://www.clinicalkey.com. Accessed March 7, 2017.
- Frontera WR. Lumbar spinal stenosis. In: Essentials of Physical Medicine and Rehabilitation: Musculoskeletal Disorders, Pain, and Rehabilitation. 3rd ed. Philadelphia, Pa.: Saunders Elsevier; 2015. https://www.clinicalkey.com. Accessed March 7, 2017.
- Cervical stenosis, myelopathy and radiculopathy. North American Spine Society. http://www.knowyourback.org/pages/spinalconditions/degenerativeconditions/cstenosis_myelopathy_radiculopathy.aspx. Accessed March 7, 2017.
- Levin K. Lumbar spinal stenosis: Treatment and prognosis. http://www.uptodate.com/home. Accessed March 7, 2017.
- Kim K, et al. Nonsurgical Korean integrative treatments for symptomatic lumbar spinal stenosis: A three-armed randomized controlled pilot trial protocol. Evidence-Based Complementary and Alternative Medicine. 2016;2016:2913248. https://www.hindawi.com/journals/ecam/2016/2913248/. Accessed March 7, 2017.
- Dasenbrock HH, et al. The impact of provider volume on the outcomes after surgery for lumbar spinal stenosis. Neurosurgery. 2012;70:1346.
- AskMayoExpert. Lumbar spinal stenosis. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2016.
- AskMayoExpert. Minimally invasive lumbar decompression (MILD). Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2017.
- Abt NB, et al. Thirty day postoperative outcomes following anterior lumbar interbody fusion using the National Surgical Quality Improvement Program database. Clinical Neurology and Neurosurgery. 2016;143:126.
- Barbara Woodward Lips Patient Education Center. Spinal stenosis. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2003.
- Barbara Woodward Lips Patient Education Center. Minimally invasive lumbar decompression (MILD). Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2012.
- Watson JC (expert opinion). Mayo Clinic, Rochester, Minn. March 28, 2017.
- Brown AY. Allscripts EPSi. Mayo Clinic, Rochester, Minn. Feb. 13, 2017.
- Bydon M (expert opinion). Mayo Clinic, Rochester, Minn. April 17, 2017.
- Onishi K, et al. Human adipose-derived mesenchymal stromal/stem cells remain viable and metabolically active following needle passage. Physical Medicine and Rehabilitation. 2016;8:844.
- Staats PS, et al. MiDAS ENCORE: Randomized controlled clinical trial report of 6-month results. Pain Physician. 2016;19:25.
- Chou R. Subacute and chronic low back pain: Nonsurgical interventional treatment. www.uptodate.com/home. Accessed March 22, 2017.
- Chou R, et al. Nonpharmacologic therapies for low back pain: A systematic review for an American College of Physicians Clinical Practice Guidelines. Annals of Internal Medicine. 2017;166:1.
- Morrey ME, et al. Molecular landscape of arthrofibrosis: Microarray and bioinformatics analysis of the temporal expression of 380 genes during contracture genesis. Gene. 2017;610:15.