Ankylosing Spondylitis

Ankylosing Spondylitis (AS) is a type of progressive arthritis that leads to chronic inflammation of the spine and sacroiliac (SI) joints. AS primarily affects the axial skeleton, including the ligaments and joints. Inflammation due to AS can also affect other joints and organs in the body, such as the eyes, lungs, kidneys, shoulders, knees, hips, heart, and ankles. AS is a true “systemic” disease, meaning the problem causes changes throughout the body.