What is Ankylosing Spondylitis? Ankylosing Spondylitis (AS) is a chronic inflammatory condition that primarily affects the spine and sacroiliac joints. It is part of a group of diseases known as spondyloarthropathies, which are characterized by inflammation in the joints and entheses (where tendons and ligaments attach to bone). Understanding the causes of ankylosing spondylitis involves […]