Idiopathic inflammatory myopathies (IIM) are a great concern in acquired muscle illnesses. An appropriate and rapid diagnosis is necessary, because morbidity and mortality are high and a specific treatment is needed. Currently the use of muscle MRI (magnetic resonance imaging) in departments managing IIM is common. In absence of recommendations fixing their place in the diagnostic phase, the practices observed are extremely heterogeneous. This practices diversity well reflects the lack of data in the literature, making it impossible to appreciate the real contribution of this test. The main aim of this interventional study is to evaluate the diagnostic accuracy of muscle MRI (in terms of sensitivity, specificity, predictive positive value and predictive negative value) for patients who are suspected to suffer from IIM.
Age range
18 Years
Sex
ALL
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A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Evaluation of T1 and STIR (Short Tau Inversion Recovery) sequences of muscle MRI.
Timeframe: between Day 0 and 24 months
Presence of IIM diagnosed by muscle biopsy
Timeframe: between Day 0 and 24 months