Differences in Topographical Location of Sacroiliac Joint MRI Lesions in Patients With Early Axial Spondyloarthritis and Mechanical Back Pain

Rosa Marie Kiil; Clara E. Mistegaard; Anne Gitte Loft; Anna Zejden; Oliver Hendricks; Anne Grethe Jurik


Arthritis Res Ther. 2022;24(75) 

In This Article


In conclusion, axSpA patients had a widespread distribution of BME with high volumes, whereas BME in the MBP group predominantly were located in the middle anterior part of the sacrum, demonstrating a 'strain-related' BME pattern. Furthermore, BME in the ligamentous compartment was almost exclusively seen in axSpA, which also demonstrated a widespread distribution of structural changes. In the early diagnostic period, these findings may contribute to the distinction between axSpA and MBP patients with SIJ MRI changes and thereby facilitate the axSpA diagnosis.