What is PDD? Pervasive Development Disorder (PDD) is an umbrella term for the following:

  • Autism
  • Asperger Syndrome
  • Rett Syndrome
  • Childhood Disintegrative Disorder
  • PDD-NOS (Pervasive Developmental Disorder Not Otherwise Specified) used to describe atypical autism.

The five conditions that come under the umbrella of PDD all include impairments in using and understanding language, difficulty relating to people, unusual play skills, difficulty with changes in routine, repetitive body movements.

If your child has been given a diagnosis of PDD you will need to ask the person making the diagnosis to be clear which condition they are referring to.  Many medical professionals apply to the term PDD to anyone who has autism.

If your child has Rhett Syndrome  or Childhood Disintegrative Disorder, then they might not share all the characteristics of a child with autism and you might want to seek expert help.