RT Journal Article SR Electronic T1 Peritenon extensor tendon inflammation in Psoriatic Arthritis is an enthesitis-related lesion JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP jrheum.180856 DO 10.3899/jrheum.180856 A1 Cristina MacĂ­a Villa A1 Sandra Falcao A1 Marwin Gutierrez A1 Julio Medina A1 Hilde Berner Hammer A1 Eugenio De Miguel YR 2019 UL http://www.jrheum.org/content/early/2019/01/23/jrheum.180856.abstract AB Objective To analyse the association between enthesitis, synovitis and peritenon extensor tendon inflammation (PTI) in Psoriatic Arthritis (PsA). Methods PsA patients with swelling of metacarpophalangeal joints were included. Grey scale (GS) and power Doppler (PD) were used for synovitis and PTI ultrasound identification. Madrid Sonographic Enthesis Index (MASEI) was used for enthesitis assessment. PD activity was evaluated using PD item of MASEI and PD OMERACT definition. Results Synovitis had no association with enthesitis. PTI was associated with PD MASEI and PD OMERACT. Only PD OMERACT showed a positive correlation with PTI. Conclusion In PsA, PTI is associated to enthesitis, on contrary to synovitis.