Ankylosing spondylitis is a chronic inflammatory disease. It causes arthritis of the joints, mainly the spine and hips. Ankylosing spondylitis can also cause inflammation of the eyes, lungs, or heart valves.
In severe cases, new bone may develop between the spinal bones. This can cause some areas of the spine to fuse. This fusion will decrease the flexibility and movement of the spine.
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Last reviewedNovember 2012by Michael Woods, MD
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