Diagnosis and Testing
How do I get tested for ankylosing spondylitis?
There are several blood tests available to check for inflammation markers and the presence of the HLA-B27 gene. Having the HLA-B27 gene doesn’t mean you will develop AS. Fewer than 1 of 20 people with HLA-B27 actually develop symptoms of AS. The diagnosis of AS is made on the basis of a combination of symptoms, physical examination findings, lab results, and imaging.