While some people are born with a small spinal canal, most spinal stenosis occurs when something happens to reduce the amount of space available within the spine. Causes of spinal stenosis may include:
Aug. 05, 2015
- 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.
- Spinal injuries. Car accidents and other major 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 adjacent tissue immediately following back surgery also can put pressure on the spinal cord or nerves.
- Spinal stenosis. National Institute of Arthritis and Musculoskeletal and Skin Diseases. http://www.niams.nih.gov/health_info/spinal_stenosis. Accessed April 23, 2015.
- Goldman L, et al. Mechanical and other lesions of the spine, nerve roots and spinal cord. In: Goldman's Cecil Medicine. 24th ed. Philadelphia, Pa.: Saunders Elsevier; 2012. http://www.clinicalkey.com. Accessed April 23, 2015.
- Frontera WR. In: Essentials of Physical Medicine and Rehabilitation: Musculoskeletal Disorders, Pain, and Rehabilitation. 3rd ed. Philadelphia, Pa.: Saunders Elsevier; 2015. http://www.clinicalkey.com. Accessed April 23, 2015.
- Cervical stenosis and myelopathy. North American Spine Society. http://www.knowyourback.org/pages/spinalconditions/degenerativeconditions/cstenosis_myelopathy_radiculopathy.aspx. Accessed April 23, 2015.
- Levin K. Lumbar spinal stenosis. http://www.uptodate.com/home. Accessed April 23, 2015.
- Huddleston PM (expert opinion). Mayo Clinic, Rochester, Minn. June 15, 2015.
- Barbara Woodward Lips Patient Education Center. Spine Surgery. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2015.
- Golden AK. Decision Support System. Mayo Clinic, Rochester, Minn. April 24, 2015.