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[Adult metachromatic leukodystrophy].

L Wang1

  • 1Dept of Neuropatholog in PLA General Hospital Beijing.

Zhonghua Shen Jing Jing Shen Ke Za Zhi = Chinese Journal of Neurology and Psychiatry
|December 1, 1990
PubMed
Summary

This study reports an adult case of metachromatic leukodystrophy with typical pathological findings but normal arylsulfatase A activity. The patient experienced a prolonged, 30-year illness course with late onset.

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Area of Science:

  • Neurology
  • Biochemistry
  • Pathology

Background:

  • Metachromatic leukodystrophy (MLD) is a rare lysosomal storage disorder typically caused by arylsulfatase A (ARSA) deficiency.
  • MLD primarily affects the white matter of the central and peripheral nervous systems.

Observation:

  • An adult patient presented with clinical and pathological features consistent with MLD, including characteristic brain and sural nerve biopsy findings.
  • Ultrastructural examination revealed typical membrane-bound inclusions in white matter and Schwann cells.

Findings:

  • Despite the characteristic MLD pathology, the patient exhibited normal leukocyte arylsulfatase A activity.
  • This finding challenges the conventional diagnostic criteria for MLD, suggesting potential alternativePathways or variants.

Implications:

  • This case highlights the importance of considering atypical presentations of MLD, especially in adults with prolonged disease courses.
  • Further research is needed to elucidate the genetic and biochemical basis of MLD variants with normal ARSA activity.
  • Diagnostic approaches for MLD may require revision to encompass cases with discordant biochemical and pathological findings.

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