1. Pediatric neuromuscular channelopathies.
- Author
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Vivekanandam V, Munot P, and Jayaseelan DL
- Subjects
- Humans, Child, Neuromuscular Diseases diagnosis, Neuromuscular Diseases genetics, Pediatrics methods, Myotonia genetics, Myotonia diagnosis, Mutation genetics, Channelopathies genetics, Channelopathies diagnosis
- Abstract
Pediatric skeletal muscle channelopathies include a spectrum of conditions including nondystrophic myotonias and periodic paralyses. They are rare inherited conditions that can cause significant morbidity. They are characterized by episodic stiffness and weakness. While there is significant phenotypic variability, there are distinct diagnostic features. The nondystrophic myotonias encompass myotonia congenita, paramyotonia congenita, and sodium channel myotonia caused by mutations in chloride and sodium channels. The clinical manifestations vary across age groups and a small subset with sodium channel mutations may have severe presentation with fetal akinesia, laryngospasm, or congenital myopathy. The periodic paralyses include hypokalemic periodic paralysis, hyperkalemic periodic paralysis, and Andersen-Tawil syndrome. The phenotypic differences between the groups can be helpful in diagnosis. It is important to review the cardiac phenotype in Andersen-Tawil syndrome due to a risk of life-threatening cardiac arrhythmias. Early and accurate diagnosis utilizing clinical features aided by investigations is important across all the pediatric channelopathies, as effective symptomatic treatment is available and can substantially improve quality of life., (Copyright © 2024 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.)
- Published
- 2024
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