Frequency and Anatomic Distribution of MRI Lesions in the Sacroiliac Joints of Healthy Subjects and Patients with Spondyloarthritis. Dr Hecquet. #ACR20 @RheumNow BME was seen in 65% patients with Spa and in 20% without spondyloarthritis predominantly in the antero-middle quadrant https://t.co/OUYz2FQ5Yp