Just FYI and all, the current clinical picture of autism, and its spectrum brothers [and odd sister here and there], is that it's an umbrella term used to describe a variety of symptoms that range from mild to severe, and the cause of such is neurological in origin, i.e., neurological damage.
Quote:
Despite extensive investigation, no consistent pattern of the cause of autism has emerged. In fact, more than 60 different disease entities have been shown to be likely causes of autism, including genetic, infectious, endocrine, toxic, and space-occupying etiologies. This suggests that autism is a final common clinical presentation of a variety of underlying neurobiological and genetic processes.
Taken from
eMedicine ASDs