What is the Importance of MRI in Assessing Axial Disease Manifestations in PsA?

March 2026

In this video, rheumatology physician assistant Amanda Mixon, PA-C, discusses the critical role of MRI in identifying axial involvement in psoriatic arthritis. While clinicians often focus on peripheral joint and skin symptoms, up to 20–40% of patients may have axial disease, which can sometimes be the presenting feature. Key symptoms such as inflammatory back pain, nighttime discomfort, and morning stiffness that improves with activity should prompt further evaluation.

Amanda highlights how MRI enables early detection of inflammatory changes like sacroiliitis that may not appear on X-rays, making it an essential tool for accurate diagnosis. Early identification of axial involvement supports a domain-based treatment approach, helping clinicians select the most appropriate therapy and improve patient outcomes.

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