X-Ray Finding in Psoriatic Arthritis

Twenty-three percent of people with arthritis have psoriatic arthritis. Psoriatic arthritis usually occurs in people 30-50 years old, and usually about 10 years after the first signs of psoriasis occur. It is very rare to develop psoriatic arthritis without first having psoriaris.

Anteroposterior radiograph of the abdomen shows fusion of the sacroiliac joints. Courtesy of Bruce M. Rothschild, MD.