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Neuropediatrics 2014; 45(05): 278-288
DOI: 10.1055/s-0034-1381954
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Muscle Magnetic Resonance Imaging of the Lower Limbs: Valuable Diagnostic Tool in the Investigation of Childhood Neuromuscular Disorders

Veronika Kana
1   Institute of Neuropathology, University Hospital of Zurich, Zurich, Switzerland
,
Christian J. Kellenberger
2   Department of Diagnostic Imaging, University Children's Hospital Zurich, Zurich, Switzerland
,
Elisabeth Jane Rushing
1   Institute of Neuropathology, University Hospital of Zurich, Zurich, Switzerland
,
Andrea Klein
3   Department of Pediatric Neurology, University Children's Hospital Zurich, Zurich, Switzerland
› Author Affiliations
Further Information

Publication History

24 November 2013

15 April 2014

Publication Date:
15 July 2014 (online)

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See also:

Muscle Magnetic Resonance Imaging: A New Diagnostic Tool with Promising Avenues in Therapeutic TrialsNeuropediatrics 2014; 45(05): 273-274
DOI: 10.1055/s-0034-1389894

Abstract

Children presenting with neuromuscular symptoms are subject to exhaustive investigations. As it is noninvasive, muscle magnetic resonance imaging (MRI) is an important diagnostic tool in children, yet its impact has so far been mainly studied in small groups of genetically defined diseases, where specific MRI patterns are known. To assess the contribution of muscle MRI of the lower limbs in a diverse cohort of patients, we reviewed the diagnostic findings in 39 patients with a suspected neuromuscular disorder that underwent muscle MRI (28/39), biopsy (26/39), or both (18/39). MRI was performed without sedation in 26 of 28 patients at a mean age of 10 years (range, 1–27 years). In 10 of 28 cases (35%), MRI significantly contributed to the final diagnosis, and in 7 of 28 cases (25%), muscle MRI directly instructed genetic testing. These cases included Bethlem myopathy, laminopathy, calpainopathy, and RYR1-related myopathies. Muscle MRI serves as a valuable additional tool to guide diagnosis in suspected neuromuscular disorders in children, especially in cases with nonspecific biopsy findings.

Keywords

muscle MRI - neuromuscular disorders - congenital myopathies - myasthenic syndromes - diagnosis

Ethical Approval

Informed consent was obtained for MRI, biopsy, and genetic investigations. This study was conducted according to the rules for retrospective data analysis of the Cantonal Ethic Committee of Zurich in accordance with the general ethical approval practice for retrospective data analysis.


 

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