Juliette Ropars1, France Gravot2, Douraied Ben Salem2, François Rousseau2, Sylvain Brochard2, Christelle Pons2. 1. From the Department of Pediatrics (J.R., F.G.), CHU Brest, Brest, France; Neuromuscular Center (J.R., S.B., C.P), Brest, France; Laboratoire du Traitement de l'Information Médicale (J.R., D.B.S., F.R, S.B., C.P.), LaTIM INSERM UMR1101, Brest, France; Department of Radiology (D.B.S.), CHU Brest, Brest, France; Institut Mines Télécom Atlantiques (F.R), Brest, France; and Department of Pediatric Physical and Medical Rehabilitation (S.B., C.P.), Fondation ILDYS, Brest, France. ju.ropars@gmail.com. 2. From the Department of Pediatrics (J.R., F.G.), CHU Brest, Brest, France; Neuromuscular Center (J.R., S.B., C.P), Brest, France; Laboratoire du Traitement de l'Information Médicale (J.R., D.B.S., F.R, S.B., C.P.), LaTIM INSERM UMR1101, Brest, France; Department of Radiology (D.B.S.), CHU Brest, Brest, France; Institut Mines Télécom Atlantiques (F.R), Brest, France; and Department of Pediatric Physical and Medical Rehabilitation (S.B., C.P.), Fondation ILDYS, Brest, France.
Abstract
OBJECTIVE: To assess the evidence of a relationship between muscle MRI and disease severity in Duchenne muscular dystrophy (DMD). METHODS: We conducted a systematic review of studies that analyzed correlations between MRI measurements and motor function in patients with DMD. PubMed, Cochrane, Scopus, and Web of Science were searched using relevant keywords and inclusion/exclusion criteria (January 1, 1990-January 31, 2019). We evaluated article quality using the Joanna Briggs Institute scale. Information regarding the samples included, muscles evaluated, MRI protocols and motor function tests used was collected from each article. Correlations between MRI measurements and motor function were reported exhaustively. RESULTS: Seventeen of 1,629 studies identified were included. Most patients included were ambulant with a mean age of 8.9 years. Most studies evaluated lower limb muscles. Moderate to excellent correlations were found between MRI measurements and motor function. The strongest correlations were found for quantitative MRI measurements such as fat fraction or mean T2. Correlations were stronger for lower leg muscles such as soleus. One longitudinal study reported that changes in soleus mean T2 were highly correlated with changes in motor function. CONCLUSION: The findings of this systematic review showed that MRI measurements can be used as biomarkers of disease severity in ambulant patients with DMD. Guidelines are proposed to help clinicians choose the most appropriate MRI measurements and muscles to evaluate. Studies exploring upper limb muscles, other stages of the disease, and sensitivity of measurements to change are needed.
OBJECTIVE: To assess the evidence of a relationship between muscle MRI and disease severity in Duchenne muscular dystrophy (DMD). METHODS: We conducted a systematic review of studies that analyzed correlations between MRI measurements and motor function in patients with DMD. PubMed, Cochrane, Scopus, and Web of Science were searched using relevant keywords and inclusion/exclusion criteria (January 1, 1990-January 31, 2019). We evaluated article quality using the Joanna Briggs Institute scale. Information regarding the samples included, muscles evaluated, MRI protocols and motor function tests used was collected from each article. Correlations between MRI measurements and motor function were reported exhaustively. RESULTS: Seventeen of 1,629 studies identified were included. Most patients included were ambulant with a mean age of 8.9 years. Most studies evaluated lower limb muscles. Moderate to excellent correlations were found between MRI measurements and motor function. The strongest correlations were found for quantitative MRI measurements such as fat fraction or mean T2. Correlations were stronger for lower leg muscles such as soleus. One longitudinal study reported that changes in soleus mean T2 were highly correlated with changes in motor function. CONCLUSION: The findings of this systematic review showed that MRI measurements can be used as biomarkers of disease severity in ambulant patients with DMD. Guidelines are proposed to help clinicians choose the most appropriate MRI measurements and muscles to evaluate. Studies exploring upper limb muscles, other stages of the disease, and sensitivity of measurements to change are needed.
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