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Pervasive Developmental Disorder - Not Otherwise Specified (PDD-NOS) is another autism spectrum disorder that will no longer carry an official separate diagnosis in the DSM-V.
Also known as atypical autism, PDD-NOS involves some but not all of the classic autism characteristics.
People diagnosed with PDD-NOS may struggle with language or social skills or repetitive behaviors, but they may not encounter challenges in all three areas.
This disorder differs from Asperger's Syndrome because of the language skills; some people with PDD-NOS may have language delays.
Pervasive developmental disorder-not otherwise specified, or PDD-NOS, is also referred to as atypical personality development, atypical autism, or atypical PDD.