Fast Five Quiz: Psoriatic Arthritis Imaging

Herbert S. Diamond, MD


February 01, 2022

Figure 2. Psoriatic arthritis x-ray, feet

Radiographic findings in psoriatic arthritis may include bony proliferation near joints and ligament and/or tendon insertion sites (ie, entheses). Sites of enthesis include the calcaneus, ischial tuberosities, femoral trochanters, ankle malleoli, anterior patella, ulnar olecranon, and condyles of the distal femur and proximal fibula.

Juxta-articular osteoporosis is either absent or minimal in patients with psoriatic arthritis. It is more prominent in rheumatoid arthritis.

Joint erosions in psoriatic arthritis typically begin in the periarticular area before progressing to the more central areas. Asymmetrical destruction of the distal interphalangeal joints with bony ankylosis may also be seen. Resorption of the terminal phalangeal tufts is another feature that helps distinguish psoriatic arthritis from rheumatoid arthritis.

Learn more about radiographic findings in psoriatic arthritis.


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