Scientists sponsored by the National Institute of Youngster Health and Human Development have discovered that a mutation in the sequence of a single gene can cause Rett syndrome.This discovery may help doctors slow or stop the progress of the syndrome.If a youngster has symptoms of either of these disorders, but does not meet the specific criteria for either, the diagnosis is called pervasive developmental disorder not otherwise specified (PDD-NOS).Other rare, very severe disorders that are included in the ASD are Rett syndrome and childhood disintegrative disorder.Some moms and dads report the change as being sudden, and that their kids start to reject individuals, act strangely, and lose language and social skills they had previously acquired.In other cases, there is a plateau, or leveling, of progress so that the difference between the youngster with autism and other kids the same age becomes more noticeable.Each youngster will display communication, social, and behavioral patterns that are individual but fit into the overall diagnosis of ASD.
If she has been talking, she stops; she cannot control her feet; she wrings her hands.Pediatricians, family doctors, daycare providers, educators, and moms and dads may initially dismiss signs of ASD, optimistically thinking the youngster is just a little slow and will "catch up." Although early intervention has a dramatic impact on reducing symptoms and increasing a youngster's ability to grow and learn new skills, it is estimated that only 50 percent of kids are diagnosed before kindergarten.All kids with ASD demonstrate deficits in 1) social interaction, 2) verbal and nonverbal communication, and 3) repetitive behaviors or interests.Prevalence studies have been done in several states and also in the United Kingdom, Europe, and Asia. This wide range of prevalence points to a need for earlier and more accurate screening for the symptoms of ASD.The earlier the disorder is diagnosed, the sooner the youngster can be helped through treatment interventions.
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ASD is defined by a certain set of behaviors that can range from the very mild to the severe.