Rheumatoid arthritis. A, early changes: symmetric swelling of the metacarpophalangeal and proximal interphalangeal joints. B, ulnar deviation of the fingers and subluxation of the metacarpophalangeal joints. C, boutonnière deformity (fingers III and IV). D, swelling of the metacarpophalangeal and proximal interphalangeal joints, subluxation of the metacarpophalangeal joints, numerous rheumatoid nodules around the joints. E, swan-neck deformity of the little finger.
