“7 Disorders are part of or closely related to Autism. Each disorder has symptoms commonly seen with autism, as well as its own specific symptoms. These disorders are:
- Williams Syndrome
- Fragile X Syndrome
- Landau-Kleffner Syndrome
- Prader-Willi Syndrome
- Angelman Syndrome
- Rett Syndrome
- Tardive Dyskinesia”
Autism Research Institute (7 Disorders Closely Related to Autism – Autism Research Institute)