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Case Report
Online Published: 01 Mar 2024
 


Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy

Najla Binsabbar, Sadia Tabassum.


Abstract
Background: Infantile onset progressive leukoencephalopathy with or without deafness is an autosomal recessive neurodegenerative disorder with variable clinical presentation, manifesting in infancy or early childhood. This disorders is one of KARS1 gene mutation spectrum that results mostly from compound heterozygous mutations rather than homozygous mutations, resulting in a dysfunctional mitochondrial enzyme.

Case presentation: We report our 4-year-old Saudi boy of non-consanguineous parents, with a compound heterozygous mutation in KARS1 gene presenting clinically with speech delay, bilateral sensonural hearing loss, unilateral progressive hemiparesis, iron deficiency anemia and lytic bone lesions.

Conclusion: KARS1 mutation has a heterogenous phenotypic presentation, and variable clinical severity. We report a new clinical feature of lytic bone lesions which could potentially expand the phenotype of this genetic disorder spectrum. Early recognition of the clinical presentation is warranted to facilitate diagnosis, prognosis and appropriate family counseling.

Key words: KARS1, leukoencephalopathy, developmental delay, hemiplegia, deafness, lytic bone lesions.


 
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Pubmed Style

Binsabbar N, Tabassum S. Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy. JBCGenetics. 2023; 6(2): 129-132. doi:10.24911/JBCGenetics/183-1698921213

Web Style

Binsabbar N, Tabassum S. Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy. https://www.jbcgenetics.com/?mno=175389 [Access: November 14, 2024]. doi:10.24911/JBCGenetics/183-1698921213

AMA (American Medical Association) Style

Binsabbar N, Tabassum S. Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy. JBCGenetics. 2023; 6(2): 129-132. doi:10.24911/JBCGenetics/183-1698921213


Vancouver/ICMJE Style

Binsabbar N, Tabassum S. Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy. JBCGenetics. (2023), [cited November 14, 2024]; 6(2): 129-132. doi:10.24911/JBCGenetics/183-1698921213


Harvard Style

Binsabbar, N. & Tabassum, . S. (2023) Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy. JBCGenetics, 6 (2), 129-132. doi:10.24911/JBCGenetics/183-1698921213


Turabian Style

Binsabbar, Najla, and Sadia Tabassum. 2023. Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy. Journal of Biochemical and Clinical Genetics, 6 (2), 129-132. doi:10.24911/JBCGenetics/183-1698921213


Chicago Style

Binsabbar, Najla, and Sadia Tabassum. "Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy." Journal of Biochemical and Clinical Genetics 6 (2023), 129-132. doi:10.24911/JBCGenetics/183-1698921213


MLA (The Modern Language Association) Style

Binsabbar, Najla, and Sadia Tabassum. "Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy." Journal of Biochemical and Clinical Genetics 6.2 (2023), 129-132. Print. doi:10.24911/JBCGenetics/183-1698921213


APA (American Psychological Association) Style

Binsabbar, N. & Tabassum, . S. (2023) Undiscovered Phenotype of KARS1 Related Mitochondrial Leukoencephalopathy. Journal of Biochemical and Clinical Genetics, 6 (2), 129-132. doi:10.24911/JBCGenetics/183-1698921213




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