Ankylosing spondylitis (AS) is one of the most common types of inflammatory arthritis. It is estimated to affect up to 1 in 200 people.
Ankylosing spondylitis primarily affects the spine, but can also involve the hips, knees, shoulders, and rib cage. The most common symptom of AS is long-term back pain, along with spinal stiffness in the morning or after a long period of rest (this is the main reason why AS is often mis-diagnosed as ordinary “low back pain”).
Unlike in many other forms of arthritis where women are most affected, three out of four people diagnosed with ankylosing spondylitis are men. It tends to strike in the prime of life; while it can strike at any age, it is most common in people between ages 15 and 40. While it has no known cure, it is treatable; with the proper care, people who are diagnosed with AS can lead full, productive lives.
Diagnosis of ankylosing spondylitis