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Ankylosing Spondylitis
Alternate Names : Rheumatoid Spondylitis, Spondylarthropathy, Spondylitis
Definition Spondylitis involves inflammation of one or more vertebrae. Ankylosing spondylitis is a chronic inflammatory disease that affects the joints between the vertebrae of the spine, and the joints between the spine and the pelvis. It eventually causes the affected vertebrae to fuse or grow together. (See arthritis).
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Overview, Causes, & Risk Factors
The cause of ankylosing spondilitis is unknown, but genetic factors seem to play a role. The disease starts with intermittent hip and/or lower-back pain that is worse at night, in the morning, or after inactivity.
Back pain begins in the sacroiliac joint (between the pelvis and the spine) and may progress to include the lumbosacral spine and the thoracic spine (chest portion of the spine).
Pain may be eased by assuming a bent posture. Limited expansion of the chest occurs because of the involvement of the joints between the ribs. The symptoms may worsen, go into remission, or stop at any stage.
With progressive disease, deterioration of bone and cartilage can lead to fusion in the spine or peripheral joints, affecting mobility. It can be extremely painful and crippling. The heart, the lungs, and the eyes may also become affected.
The disease most frequently begins between age 20 and 40, but may begin before age 10. It affects more males than females. Risk factors include a family history of ankylosing spondylitis and male gender. About 0.21% of Americans over age 15 are affected.
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Jump to another section
• Definition
• Ankylosing Spondylitis Overview, Causes, & Risk Factors
• Ankylosing Spondylitis Symptoms & Signs
• Ankylosing Spondylitis Prevention
• Ankylosing Spondylitis Diagnosis & Tests
• Ankylosing Spondylitis Treatment
• Ankylosing Spondylitis Prognosis
• Ankylosing Spondylitis Complications
• Calling Your Health Care Provider
• Pictures & Images
Topics that might be of interest to you Diseases & Conditions
• Anemia
• Aortic Stenosis
• Arthritis
• Idiopathic Pulmonary Fibrosis
• Uveitis
Tests & Exams
• CBC
• ESR
• HLA-B27 Antigen
• Pelvis X-Ray
• Thoracic Spine X-Ray
Other Topics
• Chronic
• Joint Pain
• Joint Swelling
• Limited Range of Motion
• Peripheral
Review Date : 8/6/2003
Reviewed By : Megan E. B. Clowse, M.D., M.P.H., Division of Rheumatology, Johns Hopkins Hospital, Baltimore, MD. Review provided by VeriMed Healthcare Network.
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