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Case 35 - Congenital Myasthenic Syndromes (CMS): Dok7

from Disorders of the Neuromuscular Junction

Published online by Cambridge University Press:  29 November 2024

Jessica E. Hoogendijk
Affiliation:
University Medical Center Utrecht
Marianne de Visser
Affiliation:
Amsterdam University Medical Center
Pieter A. van Doorn
Affiliation:
Erasmus MC, University Medical Center, Rotterdam
Erik H. Niks
Affiliation:
Leiden University Medical Center
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Summary

A 7-year-old girl visited the outpatient clinic because of difficulty walking. She had never managed to run properly, and experienced frequent falls ever since she began walking independently at the age of 18 months. Jumping was not possible, and when stepping up or down, she needed support below her arms. There was no fluctuation of symptoms during the day, but she had suffered from periods that could last several weeks in which using the stairs was completely impossible. She was unable to blow up a balloon and her speech was slow and poorly articulated. There were no complaints about chewing or swallowing. She had a healthy non-identical twin sister and the family history was unremarkable.

Type
Chapter
Information
Neuromuscular Disease
A Case-Based Approach
, pp. 168 - 171
Publisher: Cambridge University Press
Print publication year: 2024

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References

Suggested Reading

Finlayson, S, Morrow, JM, Rodriguez Cruz, PM, et al. Muscle magnetic resonance imaging in congenital myasthenic syndromes. Muscle Nerve 2016;54(2):211219. doi: 10.1002/mus.25035. Epub 2016 Feb 22. PMID: 26789134; PMCID: PMC4982021.CrossRefGoogle ScholarPubMed
Kao, JC, Milone, M, Selcen, D, et al. Congenital myasthenic syndromes in adult neurology clinic: a long road to diagnosis and therapy. Neurology 2018;91(19):e1770e1777. doi: 10.1212/WNL.0000000000006478. Epub 2018 Oct 5. PMID: 30291185; PMCID: PMC6251603.CrossRefGoogle Scholar
Ohno, K, Ohkawara, B, Shen, XM, Selcen, D, Engel, AG. Clinical and pathologic features of congenital myasthenic syndromes caused by 35 genes-a comprehensive review. Int J Mol Sci 2023;24(4):3730. doi: 10.3390/ijms24043730. PMID: 36835142; PMCID: PMC9961056.CrossRefGoogle ScholarPubMed
Ramdas, S, Beeson, D. Congenital myasthenic syndromes: where do we go from here? Neuromuscul Disord 2021;31(10):943954. doi: 10.1016/j.nmd.2021.07.400. PMID: 34736634.CrossRefGoogle Scholar

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