What are the causes of Ankylosing Spondylitis? From Medical News Today
What are the causes of ankylosing spondylitis?
Experts are not sure what causes autoimmune diseases in general. Scientists have identified a specific gene which is closely associated with the development of ankylosing spondylitis. Nine in every ten patients with AS have a specific gene, known as HLA-B27 (human leukocyte antigen B27).
Experts believe that people who carry the HLA-B27 gene have a higher risk of developing the disease. They also stress that the risk for those carrying the gene is still very small.