- bilateral and symmetrical involvement
- proximal interphalangeal joint space narrowing
- metacarpal heads erosions
- metacarpophalangeal joint space narrowing
- metacarpophalangeal joint osteopenia
- pancarpal and radiocarpal involvement with erosions
- carpometacarpal erosion
- distal radioulnar joint loss of space
- distal interphalangeal joints spared
- soft tissue swelling