What Is Ankylosing Spondylitis?

Ankylosing spondylitis is a type of chronic arthritis of the spine and the sacroiliac joints (in the pelvis). The inflammation of the vertebrae (spondylitis) can eventually lead to the fusion of the vertebrae - they cement together (ankylosis). This type of chronic arthritis affects the bones, muscles and ligaments...

Source: http://www.medicalnewstoday.com/articles/248217.php

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