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Neurophysiological testing in long-standing cystinosis.

W Müller-Felber1, M Schröder, M Hirschmann

  • 1Friedrich-Baur-Institut, University of Munich, Germany.

Electromyography and Clinical Neurophysiology
|April 20, 1999
PubMed
Summary

This study presents neurophysiological data on two brothers with cystinosis, detailing a myopathy that preceded neurological involvement. The findings highlight a progressive muscle disorder in cystinosis patients.

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Area of Science:

  • Neurology
  • Genetics
  • Biochemistry

Background:

  • Cystinosis is a rare genetic lysosomal storage disease.
  • It leads to the accumulation of cystine in various organs.
  • Neurological complications are known but their early manifestations require further study.

Observation:

  • Two brothers with long-standing cystinosis were studied.
  • Both presented with a distally symmetrical myopathy.
  • The myopathy affected the arms more than the legs.

Findings:

  • Myopathy was observed to occur before polyneuropathy.
  • Muscle weakness preceded signs of central nervous system involvement.
  • Neurophysiological data revealed specific patterns of muscle impairment.

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Implications:

  • Early identification of myopathy may be crucial for managing cystinosis.
  • Understanding the temporal sequence of neurological symptoms can guide therapeutic strategies.
  • This case series contributes to the understanding of the neurophysiological spectrum of cystinosis.