Medically reviewed by Mohamad Hassan, PT Sacroiliitis is inflammation of the sacroiliac (SI) joint in the pelvic region of ...

Ankylosing spondylitis (AS) is a type of arthritis that causes inflammation of the joints of your spine, resulting in pain. AS often affects the sacroiliac (SI) joints, where the base of your ...

and possibly include sacroiliitis, spondylitis, enthesitis, dactylitis and inflammatory eye disease. Diagnosis, and hence the implementation of proper treatment, is often delayed by years.