Most frequently occurs in postmenopausal females. Predilection to involve DIP and PIP joints of the hands. May be mistaken for rheumatoid and psoriatic arthritis.
Radiographic features:
- Severe degenerative changes with osteophytes and subchondral sclerosis at the DIP and PIP joints of the fingers, and the CMC and IP joints of the thumb
- Central erosions due to destruction of articular cartilage are seen with relative sparing of the joint margins produce "seagull" or "gull-wing" sign associated with this arthrosis. Seen at the 4th DIP joint in this example.
