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Atypical absence in man with intellectual disability, marked autistic features, and Lennox-Gastaut syndrome (EEG)

An atypical absence event during which the patient has interrupted activity and is motionless with staring, lasting about 14 seconds with concomitant generalized slow-spike and polyspike-wave activity while awake. (Contributed by Dr. Athanasios Covanis.)

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Associated Disorders

  • Angelman syndrome
  • Atypical benign partial epilepsy
  • Dravet syndrome
  • Epilepsy with myoclonic-atonic seizures
  • Epileptic encephalopathy with continuous spike-and-wave during sleep
  • Guanidinoacetate methyltransferase deficiency
  • Lennox-Gastaut syndrome
  • Prader-Willi syndrome