What are the clinical features of Lennox-Gastaut syndrome (LGS)?

Updated: Nov 09, 2018
  • Author: Koshi A Cherian, MD; Chief Editor: Amy Kao, MD  more...
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Lennox-Gastaut syndrome (LGS), or childhood epileptic encephalopathy, is a pediatric epilepsy syndrome characterized by multiple seizure types; mental retardation or regression; and abnormal findings on electroencephalography (EEG). See the image below.

Slow spike wave pattern in a 24-year-old awake mal Slow spike wave pattern in a 24-year-old awake male with Lennox-Gastaut syndrome. The slow posterior background rhythm has frequent periods of 2- to 2.5-Hz discharges, maximal in the bifrontocentral areas, occurring in trains as long as 8 seconds without any clinical accompaniment.

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