A differential diagnosis for ASD at this stage might also consider intellectual disability, hearing impairment, and a specific language impairment such as Landau–Kleffner syndrome.

A differential diagnosis for ASD at this stage might also consider mental retardation, hearing impairment, and a specific language impairment such as Landau–Kleffner syndrome.

A differential diagnosis for ASD at this stage might also consider intellectual disability, hearing impairment, and a specific language impairment such as Landau

A differential diagnosis for Autism Spectrum Disorder at this stage might also consider intellectual disability, hearing impairment, and a specific language impairment such as Landau-Kleffner syndrome.

A differential diagnosis for ASD at this stage might also consider mental retardation, hearing impairment, and a specific language impairment such as Landau-Kleffner syndrome.

This association between the Landau-Kleffner syndrome and autism has led many clinicians and families to search for the typical EEG pattern (ESES) in individuals with autism.

Many, many children and adults with this disorder will display some abnormalities on their sleep EEG, but probably very few have true Landau-Kleffner syndrome that will respond to treatment.

The importance of these findings is that, although rare, the Landau-Kleffner syndrome can resolve spontaneously and in some cases can be treatable with prednisone, a steroid medication related to cortisone.

The usual age of onset of language loss or regression is around 4 years of age, which makes the Landau-Kleffner syndrome distinguishable from autism on these grounds, in that autism usually is first exhibited in younger children.

First there’s crystal child/indigo mom theories, then it’s Autism and now there’s questions of Landau-Kleffner syndrome which, from what I can tell in my research, she has never actually explored.