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Child Neurology: Dravet syndrome: when to suspect the diagnosis

John J Millichap1, Sookyong Koh, Linda C Laux

  • 1Division of Neurology, Children's Memorial Hospital, Northwestern University Medical School, Chicago, IL 60614, USA. jmillichap@childrensmemorial.org

Neurology
|September 30, 2009
PubMed

Insights

Dravet syndrome (DS), a severe epilepsy, begins with prolonged seizures in infancy, often mistaken for febrile seizures. Early diagnosis via SCN1A genetic testing is crucial for management and improved outcomes.

Area of Science:

  • Neurology
  • Genetics
  • Pediatric Epilepsy

Background:

  • Dravet syndrome (DS), formerly severe myoclonic epilepsy in infancy (SMEI), is a severe epileptic encephalopathy.
  • It manifests with prolonged seizures in the first year of life, often triggered by fever and misdiagnosed as febrile seizures.

Observation:

  • Initial EEGs and neuroimaging are typically normal in DS.
  • Developmental delay and regression appear in the second year, accompanied by severe seizure types like status epilepticus and myoclonic seizures.

Findings:

  • Diagnosis is confirmed through genetic testing, identifying mutations in the SCN1A gene.
  • Delayed diagnosis is common due to initial presentation mimicking febrile seizures.

Implications:

  • Early recognition and diagnosis of DS are critical.
  • Appropriate anticonvulsant management and treatment plans can reduce seizure frequency and severity.
  • Timely intervention may improve long-term developmental outcomes for children with Dravet syndrome.

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