The Landau-Kleffner syndrome.

The Landau-Kleffner syndrome is a rare disorder characterised by an acquired receptive and expressive aphasia and epileptic seizuresl-4; it is also known as 'a syndrome of acquired aphasia with convulsive disorder'3 or 'acquired aphasia of childhood with epilepsy'.5 It is defined on the basis of specific clinical and electroencephalography (EEG) criteria. It is almost certainly under recognised and therefore under diagnosed, an observation which has at least been partly responsible for the recent inception of a specific self help or support group for parents with affected children.