Diagnostic Accuracy of Whole Body Magnetic Resonance Imaging in Inflammatory Myopathies
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 139
- Locations
- 1
- Primary Endpoint
- Evaluation of T1 and STIR (Short Tau Inversion Recovery) sequences of muscle MRI.
Study Overview
Brief Summary
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.
Detailed Description
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 as a specific treatment is needed (corticosteroids, immunosuppressant, and "biotherapies").
Currently the use of muscle MRI in departments managing IIM is common. In absence of recommendations fixing their place in the diagnostic phase, the practices observed are extremely heterogeneous. Some systematically order a muscle MRI for patients suspected to suffer from IIM, others hold this examination for patients selected according to non defined criteria, and others sometimes use MRI to follow-up patients. This practices diversity well reflects the lack of data in the literature, making it impossible to appreciate the real contribution of this test. The results published in the great majority of studies are obtained with patients whose IIM diagnosis is already established. The diagnostic accuracy of muscle MRI in real conditions of clinical practice is thus unknown for patients having a simple suspicion of IIM.
Primary scientific aim: Evaluation of 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.
Secondary scientific aim: Comparison of two diagnostic strategies: MRI-oriented muscle biopsy versus non MRI-oriented muscle biopsy.
Gold standard: muscle biopsy Index test: whole body MRI, STIR and T1 sequences Patients and setting of diagnosis tests: Screening will be realized on any patient suspected to suffer from inflammatory and addressed for muscle biopsy in one of the participating reference centres for neuro-muscular disorders. -Evaluate if RMI is efficiency to reduce false negative results during a second biopsy.
Study Design
- Study Type
- Interventional
- Allocation
- Na
- Intervention Model
- Single Group
- Primary Purpose
- Diagnostic
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Skin rash typical of dermatomyositis: "lilac" rash (+/- oedemata) of upper eyelids, periungual sign, erythematous-scaly eruption occurring over the MCP and IPP, elbow, knees (Gottron's signs ands papules), erythema of light-sensitive areas OR
- •Muscle weakness which is proximal, bilateral and objectifiable by clinical examination ≤ 4/5, and CPK≥2N (N<170).
- •Increase CPK and presence of acquired myositis specific antibody
- •Onset of troubles ≤3 years
Exclusion Criteria
- •Pregnant female
- •Proximal motive neuropathy
- •Refusing participation
- •Patient under 18 years old
- •Adult patient under legal protection
- •Patient with contraindication for MRI, pacemaker
- •For all other magnetic or ironic implanted equipments, metal workers, must contact PI to ensure their eligibility
- •Ocular muscles weakness, isolated dysarthria,
- •Patients suffering from toxic myopathy, amyloidosis, inherited muscular dystrophy
Arms & Interventions
MRI-oriented muscle biopsy
Muscle sample will be done following the usual care.
Intervention: MRI-oriented muscle biopsy (Procedure)
Outcomes
Primary Outcomes
Evaluation of T1 and STIR (Short Tau Inversion Recovery) sequences of muscle MRI.
Time Frame: between Day 0 and 24 months
Description : diagnostic accuracy of muscle MRI (in terms of sensitivity, specificity, predictive positive value and predictive negative value) for the diagnostic of inflammatory myopathy.
Presence of IIM diagnosed by muscle biopsy
Time Frame: between Day 0 and 24 months
Presence of IIM according to ENMC histological criteria
Secondary Outcomes
- Evaluation of reproductibility intra- versus inter-observers for muscle biopsy interpretation(every 3 months (up to 24 months))
- Evaluation of reproductibility intra- versus inter-observers for muscle MRI interpretation(every 3 months (up to 24 months))