#EULAR2020 #op0079 ASAS-MRI group offers updated definition of the structural lesions in SI joints in AxSpA: -erosion in >=2 consecutive slices or in >=3 SIJ quadrants - fat lesions w/depth >1cm in >=1SIJ quadrant are high priority candidates @RheumNow https://t.co/EU1WWqJ4h3