medical Definition of ankylosing spondylitis
- Although the disease has a predilection for the axial skeleton, the peripheral joints are commonly affected; in patients with long-standing ankylosing spondylitis, the shoulders are involved in approximately 33 percent of cases.
- —Medical Radiography & Photography, 1982
- Although ankylosing spondylitis has been considered a relatively benign form of arthritis, a recent study showed that the rates of pain and disability among patients with ankylosing spondylitis were similar to the rates among those with rheumatoid arthritis.
- —Jennifer D. Gorman, The New England Journal of Medicine, 2 May 2002