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Diffuse leukodystrophy with a large-scale mitochondrial DNA deletion

A Nakai1, Y Goto, K Fujisawa

  • 1Department of Paediatrics, Fukui Medical School, Japan.

Lancet (London, England)
|June 4, 1994
PubMed
Summary
This summary is machine-generated.

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Mitochondrial DNA deletion caused progressive ataxia and bulbar palsy in an 8-year-old girl. This finding highlights mitochondrial DNA mutations as a potential cause of diffuse leukodystrophy in children.

Area of Science:

  • Neurology
  • Genetics
  • Mitochondrial Biology

Background:

  • Diffuse white-matter lesions can present with progressive neurological symptoms in children.
  • Investigating the underlying cause is crucial for diagnosis and management.

Observation:

  • An 8-year-old girl presented with progressive ataxia and bulbar palsy.
  • Magnetic resonance imaging revealed diffuse white-matter lesions.
  • Cerebrospinal fluid showed slightly elevated lactate levels.

Findings:

  • Muscle biopsy demonstrated ragged-red fibers and focal cytochrome c oxidase deficiency.
  • Molecular analysis identified a large-scale mitochondrial DNA deletion (6990 bp).
  • The deletion exhibited direct repeats at its junctions.

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Implications:

  • Mitochondrial DNA mutations are a significant consideration for pediatric diffuse leukodystrophy.
  • This case underscores the importance of molecular genetic testing in unexplained neurological disorders.
  • Early identification of mitochondrial disorders can guide therapeutic strategies.