Ankylosing Spondylitis, Orthopedic Perspective (cont.)
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AS Orthopedic Symptoms
Patients with AS develop low back pain, hip pain, and stiffness, or both. Later, patients develop upper back pain and pain in the ribs. Symptoms most commonly begin in late adolescence, and males are three times more likely to develop ankylosing spondylitis than females. It is uncommon for patients over 45 years old to develop AS. If symptoms begin in those younger than 16 years, the disease is termed juvenile-onset ankylosing spondylitis, which is more common in Native Americans and in people who live in developing countries.
People with ankylosing spondylitis generally complain of back pain of gradual onset that may not become apparent until the condition is well established. The pain progresses with a series of flare-ups and remissions. The back pain is dull and is felt in the hips and buttocks. The pain often begins on one side (unilateral) and comes and goes (intermittent), but as the disease progresses, it becomes more persistent and affects both sides (bilateral).
Key components of a person's medical history that suggest ankylosing spondylitis include the following:
Involvement of the hips and shoulder joints is possible but is more common in juvenile-onset ankylosing spondylitis (patients with onset before age 16 years).
Involvement of the jaw (temporomandibular joint, TMJ) can lead to decreased range of motion in the jaw and occurs in approximately 10% of people with ankylosing spondylitis.
Involvement of the ribs can lead to decreased range of motion of the chest wall and difficulty expanding the lungs during breathing.
Long-term involvement of the spine eventually leads to a progressive decrease in range of motion. Eventually, the bones of the spine grow together and prevent any motion in the affected bones of the back and neck. Involvement of the neck (cervical spine) and upper back (thoracic spine) can lead to fusion of the neck in a downward position (forward flexed) . Fusion of the neck in this position can significantly limit a person's ability to walk because of an inability to look straight ahead or to drive a car without adaptive mirrors because of difficulty turning the head.
Other complications include the following:
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