Muscle magnetic resonance imaging in congenital myasthenic syndromes

Muscle & Nerve
Sarah FinlaysonJacqueline Palace

Abstract

In this study we investigated muscle magnetic resonance imaging in congenital myasthenic syndromes (CMS). Twenty-six patients with 9 CMS subtypes and 10 controls were imaged. T1-weighted (T1w) and short-tau inversion recovery (STIR) 3-Tesla MRI images obtained at thigh and calf levels were scored for severity. Overall mean the T1w score was increased in GFPT1 and DPAGT1 CMS. T1w scans of the AChR-deficiency, COLQ, and CHAT subjects were indistinguishable from controls. STIR images from CMS patients did not differ significantly from those of controls. Mean T1w score correlated with age in the CMS cohort. MRI appearances ranged from normal to marked abnormality. T1w images seem to be especially abnormal in some CMS caused by mutations of proteins involved in the glycosylation pathway. A non-selective pattern of fat infiltration or a normal-appearing scan in the setting of significant clinical weakness should suggest CMS as a potential diagnosis. Muscle MRI could play a role in differentiating CMS subtypes. Muscle Nerve 54: 211-219, 2016.

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Citations

Apr 15, 2016·Journal of Magnetic Resonance·Omar RutledgeXiaoliang Zhang
May 6, 2016·Journal of Neurology, Neurosurgery, and Psychiatry·Pedro M Rodríguez CruzDavid Beeson
Jun 16, 2018·Human Molecular Genetics·Yasmin IssopHanns Lochmüller
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Aug 27, 2019·Muscle & Nerve·Stefan NicolauTeerin Liewluck
Jul 19, 2016·Current Opinion in Neurology·Dirk FischerMike P Wattjes
Mar 2, 2021·Journal of Neuromuscular Diseases·Tokunbor A LawalKatherine G Meilleur
Nov 9, 2021·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·Eduardo P EstephanEdmar Zanoteli

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Methods Mentioned

BETA
biopsy
glycosylation
sedation

Software Mentioned

GraphPad
SPSS
GraphPad Prism

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