Portal:Pervasive developmental disorders/Intro

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The diagnostic category pervasive developmental disorders (PDD), as opposed to specific developmental disorders (SDD), refers to a group of five disorders characterized by delays in the development of multiple basic functions including socialization and communication. The most commonly known pervasive developmental disorders are (1) autistic disorder, with the remaining identified as (2) Rett syndrome, (3) childhood disintegrative disorder, (4) Asperger syndrome, and (5) pervasive developmental disorder not otherwise specified. Please see our medical disclaimer for cautions about Wikipedia's limitations.