Psoriasis MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Syed Hassan A. Kazmi BSc, MD [2]

Overview

There are no MRI findings associated with cutaneous psoriasis, but MRI may be used in psoriatic arthritis (PsA) to diagnose the disease in its early phase.

MRI

MRI in psoriatic arthritis may show the following findings:

• Joint erosion

• Synovitis (usually secondary to extrasynovial involvement, helps to differentiate PsA from rheumatoid arthritis)
• Gadolinium contrast use can more reliably differentiate PsA from rheumatoid arthritis by relative enhancement and rate of enhancement on MRI
• Enthesitis
• Osteitis
• Peri-articular edema

T1 weighted MRI showing joint erosion in the talo-navicular joint and peri-articular edema, courtesy radiopedia.org