Fig. 3From: MRI evidence of structural changes in the sacroiliac joints of patients with non-radiographic axial spondyloarthritis even in the absence of MRI inflammationCumulative probability plots for structural lesions according to Spondyloarthritis Research Consortium of Canada (SPARCC) sacroiliac joint (SIJ) score (≥2 vs <2): erosion (a), backfill (b), and fat metaplasia (c)Back to article page