What is the prognosis of ankylosing spondylitis (AS)?

Updated: Feb 02, 2021
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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The outcome in patients with spondyloarthropathies, including AS, is generally better compared with that in patients with a disease such as rheumatoid arthritis. Patients often require long-term anti-inflammatory therapy. Morbidity can occur from spinal and peripheral joint involvement or, rarely, extra-articular manifestations. Indicators of poor prognosis include the following:

  • Peripheral joint involvement
  • Young age of onset
  • Elevated erythrocyte sedimentation rate (ESR)
  • Poor response to nonsteroidal anti-inflammatory drugs (NSAIDs)

At the onset of the disease, symptoms are generally unilateral and intermittent. As the disease progresses, pain and stiffness generally become more severe and more constant. Adequate exercise can improve symptoms and ROM.

Some patients have few, if any, symptoms. A significant portion of AS patients develop chronic progressive disease and develop disability due to spinal inflammation leading to fusion, often with thoracic kyphosis or erosive disease involving peripheral joints, especially the hips and shoulders. Patients with spinal fusion are prone to spinal fractures that may result in neurologic deficits. Most functional loss in AS occurs during the first 10 years of illness. [62]

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