Incidence of MRI Sacro-Iliac (SI) Joint Anomalies in Women With Spondyloarthritis (SpA)

Retrospective study comparing the incidence of inflammatory and structural lesions seen on MRI of the sacro-iliac (SI) joints in a population of women affected by spondyloarthritis (SpA) and control women population (MISIA study NCT02956824). A previous study (MISIA) demonstrate SpA may be misdiagnosed on MRI in postpartum women due to increased stress on the joint following pregnancy and childbirth, as MRI of the SI joints may show lesions that could mimics SpA. The primary objective of this study is to compare the incidence and pattern of MRI inflammatory and structural lesions of the SI joints between SpA and control women, and determine differentiation criteria in SpA women.