Psoriatic Arthritis and Rheumatoid Arthritis: Findings in Contrast-Enhanced MRI

OBJECTIVE. Our objective was to define typical MRI findings of the wrist and the hand in patients with psoriatic arthritis (PsA) and rheumatoid arthritis (RA).MATERIALS AND METHODS. Eighteen PsA and 21 RA patients with arthralgia of the wrist or hand joints underwent gadolinium-enhanced MRI of the wrist and hand. Two experienced radiologists interpreted abnormalities in consensus with respect to periarticular soft-tissue swelling, synovitis with or without effusion, periostitis, bone edema, bone erosions, bone cysts, and tenosynovitis. The distribution of the abnormalities also was evaluated.RESULTS. Erosions were statistically more frequent in patients with RA (p 0.05). The radiocarpal joint, the midcarpal joints, the carpometacarpal joints, and the metacarp...