Some conditions may have symptoms similar to autism; therefore, professionals must be diligent when determining a diagnosis and its treatment.
Autism is a whole-body condition and can manifest through a number of physical symptoms and characteristics.
Following is a list of related syndromes/disorders that manifest behaviors similar to those of autism and/or are more prevalent in individuals with autism:
Congenital Rubella Syndrome: Helen Keller National Center for Deaf-Blind Youths and Adults
Cornelia deLange Sydrome: Cornelia deLange Syndrome Foundation
Down Syndrome: National Down Syndrome Society
Fragile X Syndrome: National Fragile X Foundation
Klüver-Bucy Syndrome: National Institute of Neurological Disorders and Stroke
Landau-Kleffner Syndrome: National Institute of Neurological Disorders and Stroke
Lesch-Nyhan Syndrome: Lesch-Nyhan Disease network
Untreated Phenylketonuria (PKU): National PKU Alliance
Prader-Willi Syndrome: Prader-Willi Syndrome Association
Rett Syndrome: International Rett Syndrome Foundation
Tourette Syndrome: Tourette Syndrome Association
Tuberous Sclerosis: Tuberous Sclerosis Alliance
Williams Syndrome: Williams Syndrome Association