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Lead poisoning in two children with Landau-Kleffner syndrome

Landau – Kleffner syndrome (LKS) or acquired epileptic aphasia (AEA) is a rare childhood neurological disorder described in 1957 as a regression in language development usually by 3 years of age, accompanied by a convulsive disorder with a typical pattern of continuous slow wave disturbances during sleep (CSWS) in the peri-sylvian fi ssure region. 1 – 3 The medical literature does not mention a vulnerability of children with LKS to environmental toxins. We describe here two cases of lead poisoning in children with LKS.