Pervasive developmental disorders, often known as autism spectrum disorders, include the following conditions.
- autism
- Asperger's Syndrome (AS)
- pervasive developmental disorder not otherwise specified (PDD-NOS)
- Rett Syndrome
- childhood disintegrative disorder (CDD)
Sometimes, the term autism spectrum disorder refers only to autism, Asperger's Syndrome, and PDD-NOS. It has been mentioned that in future editions, the
Diagnostic and Statistical Manual of Mental Disorders (DSM) will remove Asperger's Syndrome as a separate condition, including it under autism.
Some of these conditions can be known by alternate terms:
- Autism can also be referred to as Kanner syndrome, early infantile autism, or childhood autism.
- Asperger's Syndrome might be the same as high-functioning autism.
- Pervasive developmental disorder not otherwise specified can also be called atypical autism.