Imaging in Psoriatic Arthritis: Focus on Axial Magnetic Resonance Imaging and Peripheral Musculoskeletal Ultrasound

Psoriatic arthritis (PsA) is a heterogeneous inflammatory disease characterized by diverse musculoskeletal manifestations, including peripheral and axial arthritis, enthesitis, and dactylitis, often in conjunction with skin and nail psoriasis. Imaging modalities, particularly musculoskeletal ultrasound (MSUS) and magnetic resonance imaging (MRI), are crucial for accurate diagnosis, monitoring disease activity, and assessing structural damage in PsA. This review summarizes key insights from the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) 2025 session "Imaging in psoriatic arthritis: focus on axial MRI and peripheral musculoskeletal ultrasound," highlighting advancements in both peripheral and axial imaging. Efforts to standardize imaging protocols and scoring systems continue to enhance the utility and reliability of these tools in both research and daily practice, emphasizing the importance of nuanced interpretation to avoid common pitfalls. The session also underscored the valuable input from patient research partners, whose involvement highlights a crucial commitment to patient-centered research and care in rheumatology.