A 2-year follow-up study evaluates MRI definitions and their effectiveness in early axial spondyloarthritis diagnosis.
The ASAS-MRI-SIJ+ definition outperforms the MRI study group AL. The Leiden SL combined with the ASAS-MRI-SIJ+ definition is validated, most sensitive and feasible as it simultaneously upholds lesion quantification and detection precision, making it the preferred approach. Nevertheless, SL were uncommon in early axSpA, contributing only marginally beyond AL definitions in early diagnosis.
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Bruin et al. (2026) studied this question.
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