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Related Experiment Videos

Startle epilepsy complicating aspartylglucosaminuria.

Angelo Labate1, Rita Barone, Antonio Gambardella

  • 1Institute of Neurology, School of Medicine, University Magna Graecia, Via T. Campanella, Italy.

Brain & Development
|March 24, 2004
PubMed
Summary

Aspartylglucosaminuria (AGU) can present with abnormal startle and startle epilepsy (SE), complicating its clinical picture. Early recognition and treatment with clonazepam can significantly improve gait and reduce seizures in AGU patients.

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Area of Science:

  • Neurology
  • Genetics
  • Metabolic Disorders

Background:

  • Aspartylglucosaminuria (AGU) is a rare autosomal recessive lysosomal storage disease.
  • AGU is characterized by progressive neurological deterioration, including cognitive impairment and motor deficits.

Observation:

  • A 21-year-old male with AGU presented with severe gait disturbance, frequent falls, and generalized epileptic seizures.
  • Electromyography revealed an excessive, non-habituating motor startle response.
  • Video-polygraphy captured a reflex generalized tonic seizure triggered by acoustic stimuli.

Findings:

  • Brain MRI showed no structural abnormalities.
  • The patient was diagnosed with abnormal startle and startle epilepsy (SE).
  • Treatment with clonazepam, valproate, and phenobarbital dramatically improved startle responses and seizures.

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Implications:

  • This is the first report of abnormal startle and SE occurring in AGU.
  • Misinterpretation of gait disorder as irreversible neurological decline in AGU is possible.
  • Recognizing SE in AGU is crucial for appropriate management and improved patient outcomes.