Len·nox-Gas·taut syndrome | \ ˈlen-əks-gas-ˈtō- 
\
\Medical Definition of Lennox-Gastaut syndrome
: an epileptic syndrome especially of young children that is marked by several seizure types and especially tonic, atonic, and atypical absence seizures, is associated with mild to severe impairment in intellectual functioning, may be idiopathic or have an identifiable cause (as tuberous sclerosis, brain malformation, brain damage resulting from asphyxia during birth or meningitis, or metabolic disease), and is characterized between seizures by an EEG having a slow spike and wave pattern
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