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In 1957, Landau and Kleffner described six children with a syndrome of acquired aphasia occurring between the second and eighth years of life.1 In the majority of cases, clinical seizures of various types occur. The EEG shows temporal or parieto-occipital multifocal spikes or spike waves with a potentiation during sleep. The epilepsy in Landau–Kleffner syndrome (LKS) usually has a good prognosis; however, in a large subgroup, language disturbances remain.2
Case report.
A now 7-year-old boy was born at term after an uneventful pregnancy. His parents are nonconsanguineous, and there is no family history of epilepsy, speech retardation, or hearing problems. His motor development was normal. He walked at 12 months and now, at age 7, has well developed fine motor skills. His speech development was normal until age 2½. He spoke his first words at 12 months and two-word sentences at age 2 years. At age 2½, dysarthria was first noted, but at that stage, …
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