Impact of replacing radiographic sacroiliitis by magnetic resonance imaging structural lesions on the classification of patients with axial spondyloarthritis
- Bakker, Pauline A.
- van den Berg, Rosaline
- de Hooge, Manouk
- van Lunteren, Miranda
- Ez-Zaitouni, Zineb
- Fagerli, Karen M.
- Landewé, Robert
- van Oosterhout, Maikel
- Ramonda, Roberta
- Reijnierse, Monique
- van Gaalen, Floris A.
- van der Heijde, D. sirée
DOIAbstract
Objectives. To investigate in patients with chronic back pain of a short duration, the utility of adding structural MRI lesions of the SI joints to the imaging criterion of the Assessment of SpondyloArthritis International Society (ASAS) axial SpA (axSpA) criteria and the utility of replacement of radiographic sacroiliitis by structural MRI lesions. Methods. MRI STIR (inflammation, MRI-SI), MRI T1-weighted images (structural lesions, MRI-SI-s) and radiographs of the SI joints of patients in the SPondyloArthritis Caught Early-cohort (chronic back pain:≤ months, ≤ years; onset <45 years) were scored by two well-calibrated readers. Previously proposed cut-offs for a positive MRI-SI-s were used (based on <5% prevalence in no-SpA patients): eros...
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