Ankylosing spondylitis (AS) is a rare type of arthritis in the spine whose main symptom -- back pain -- is a common, everyday complaint. That’s just one reason why so many people with AS wait years for a correct diagnosis.
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Ankylosing spondylitis (AS) is a rare type of arthritis in the spine whose main symptom -- back pain -- is a common, everyday complaint. That’s just one reason why so many people with AS wait years for a correct diagnosis.