Conditions That Mimic Rheumatoid Arthritis
Ankylosing spondylitis is a form of arthritis that mainly affects the lower back. It causes inflammation and damage at the joints, and first affects the sacroiliac joints between the spine and the pelvis.AS is three times more common in men, and inflames where the tendon inserts into bone, rather than the membrane that lines the joint as in RA.
By — Last Modified: 05/14/2013, First Published: 06/10/2011
