RT Journal Article SR Electronic T1 The Role of Ultrasound in Research and Clinical Practice in Psoriatic Arthritis: Highlights From the GRAPPA Ultrasound Workshop JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP jrheum.201677 DO 10.3899/jrheum.201677 A1 Lihi Eder A1 Sibel Z. Aydin A1 Gurjit S. Kaeley YR 2021 UL http://www.jrheum.org/content/early/2021/02/24/jrheum.201677.abstract AB Ultrasound (US) is a valuable imaging modality that can accurately identify relevant features of psoriatic arthritis (PsA), such as synovitis, tenosynovitis, and enthesitis. The Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) Ultrasound Committee ran a workshop during the annual GRAPPA meeting that was held in July 2020. The group presented the following 3 topics: (1) the transition from psoriasis to PsA and the role of US; (2) the effect of biomechanical forces on the entheses in health and disease, and insight for PsA pathogenesis; and (3) differentiation of enthesitis from pain sensitization: use and limitations of clinical and sonographic evaluation of enthesitis. This article summarizes the key messages from this workshop.