A severe form of mixed receptiveexpressive language disorder accompanied by seizures and other central nervous system (CNS) dysfunction.
Landau-Kleffner syndrome (LKS)—also called acquired epileptiform aphasia, infantile acquired aphasia, or aphasia with convulsive disorder—is a rare, childhood neurological disorder characterized by the sudden or gradual development of aphasia (loss of language) and an abnormal electroencephalogram (EEG).
A rare disease in which children (usually between the ages of 3 and 7) lose the ability to understand spoken language and to express themselves. Children with this disorder have seizures and sometimes hyperactivity or other behavioral or psychiatric disorders. Lost language skills are sometimes recovered by affected children in adolescence.