RARE AUTISM SPECTRUM DISORDERS

Rett syndrome is relatively rare, affecting almost exclusively females, one out of 10,000 to 15,000. After a period of normal development, sometime between 6 and 18 months, autism-like symptoms begin to appear. The little girl’s mental and social development regresses—she no longer responds to her parents and pulls away from any social contact. If she has been talking, she stops: she cannot control her feet: she wrings her hands. Some of the problems associated with Rett syndrome can be treated. Physical, occupational and speech therapy can help with problems of coordination, movement and speech.

Scientists sponsored by the national institute of child 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. It may also lead to methods of screening for Rett syndrome, thus enabling doctors to start treating these children much sooner, and improving the quality of life these children experience.

What are the autism spectrum disorders?

The autism spectrum disorders are more common in the pediatric population than are some better known disorders such as diabetes, spinal befida, or Down syndrome. Prevalence studies have been done in several states and also in the Untied Kingdom, Europe and Asia. A recent study of a U.S. metropolitan area estimated that 3.4 of every 1,000 children 3-10 years old autism. This wide range of prevalence points to need for earlier and more accurate screening for the symptoms of ASD.

The earlier the disorder is diagnosed the sooner the child can be helped through treatment interventions, pediatricians, family physician, day-care providers, teachers, and parents may initially dismiss signs of ASD, optimistically thinking the child is just a little slow and will catch up. Although early intervention has a dramatic impact on reducing symptoms and increasing a child’s ability to grow and learn new skills, it is estimated that only 50 percent of children are diagnosed before kindergarten.

All children with ASD demonstrate deficits in 1) social interaction, 2) verbal and nonverbal communication, and 3) repetitive behaviors or interests. In addition, they will often have unusual responses to sensory experiences, such as certain sounds or the way objects look.

Each of these symptoms runs the gamut from mild to severe. They will present in each individual child differently. For instance, a child may have little trouble learning to read but exhibit extremely poor social interaction. Each child will display communication, social, and behavioral patterns that are individual but fit into the overall diagnosis of ASD.

Children with ASD do not follow the typical patterns of child development. In some children, hints of future problems may be apparent from birth. In most cases, the problems in communication and social skills become more noticeable as the child lags further behind other unusual behaviors become apparent. Some other children start off well enough. Oftentimes between 12 and 36 months old, the differences in the way they react to people and other unusual behaviors become apparent. Some parents report the change as being sudden, and their children start to rejects people, 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 child with autism and other children the same age becomes more noticeable.

ASD is defined by a certain set of behaviors that can range from the very mild to the severe. The following possible indicators of ASD were identified on the Public Health Training Network Web cast, Autism among US.