Childhood disintegrative disorder (CDD), also known as Heller’s Syndrome is a developmental disorder that is characterized by aggression of previously acquired skills such as language and social abilities. Symptoms include:

• Lack of play

• Loss of motor skills

• Loss of social skills

• Delay in language

The following resources provide an overview of Childhood disintegrative disorder including prevalence, symptoms, diagnosis, and treatment.

Encyclopedia of Mental Disorders

Mayo Clinic

Medline Plus

WebMD

Wikipedia

Books

The Blessing of Autism: one family’s journey through childhood disintegrative disorder

When Autism Strikes: Families Cope with Childhood Disintegrative Disorder