Is It Autism, or is it Fragile X Syndrome?

How many children have been diagnosed as Autistic without having the simple blood test to determine whether they have Fragile X Syndrome?

Is It Autism, or is it Fragile X Syndrome?If that is your child, run don’t walk to your Doctor’s office and request the blood test. Yes, there is a simple test to identify the difference. The correlation is remarkable and overlaps in many cases. For between 2% and 6% of all children diagnosed with autism the cause is the Fragile X gene mutation.1 Even more remarkable is the fact that between 15% and 30% of boys with Fragile X meet the diagnostic criteria for autism.2 Why is there so little public discourse concerning Fragile X when there is a diagnosis of autism? If you don’t know much about Fragile X syndrome you are not alone. It is a relatively new area of study.

There is an entire spectrum of abilities for Fragile X Syndrome children and adults ranging from the learning-disabled to the very low functioning. Fragile X Syndrome is the second most common cause of retardation, but the range of functioning is broad with many strengths and weaknesses. Fragile X Syndrome is an X-linked hereditary disease affecting cognitive, physical, and sensory development. It involves genetic repeats found near the tip of the X chromosome.

There are many overlapping characteristics between Autistic and Fragile X Syndrome children. These include hand flapping, poor eye contact, repetitive, self-stimulating motor behaviors, as well as difficulty with social interactions, and poor play skills. The profile of Fragile X children with autistic features is visually indistinguishable from the children with autism and those without Fragile X Syndrome.

For young children these behaviors are easily identified, and cry out for appropriate educational settings and therapy for both autistic and Fragile X syndrome children. Multiple sources of information are critical, and that would include both medical and observational rating scales. It is important for children with Fragile X Syndrome to seek genetic counseling and access to treatments that have proven to be effective for these children. Some of the success stories involve the use of schedules, calming techniques, emphasis on functional language, visual cueing, and focusing on concrete experience based learning.

My Fragile X Syndrome son is now an adult, and as a result of the assistance of many educators, doctors and therapists, he is able to function as an independent adult. The journey was a difficult one fraught with trials and goals that, at times, seemed much too difficult to attain. Some of his autistic characteristics have slowed with age. We do not have an explanation to share with others, except to suggest that he independently developed ways to control those behaviors. You will never seem him flap his hands in public, and he hasn’t for many years. Still, while he was working on stifling that behavior in public he could still be observed continuing it at home. It seems these behaviors have faded with time. Somehow he was able to compensate. Social interaction continues to be a challenge, and he has learned to “smile and nod” when he is at a loss for the proper reaction. This “smile and nod” behavior has allowed him to survive in a work.

environment using a non-threatening response, as well as a pleasant one.
We still grapple with the lack of friendships that he has difficulty fostering. . While a toddler, it was easy to play in the sandbox and parallel play with others, but as an adult, who, needs to communicate and interact, we have had only minimal success with structured activities. We often wonder if he wasn’t disabled whether he still would have had a propensity to be a loner as well. With the advent of gene therapy, we await the future and the promise for a cure.

1. National Fragile X Foundation
2. Randi Hagerman, MD
Medical Director, UC Davis Medical Center, M. I. N.D. Institute

For more information on Fragile X Syndrome, please contact The National Fragile X web site at http://www.

Marilyn Morgan is the author of The Broken Toy: The story of a Fragile X Syndrome Child

Copyright © 2007 Marilyn Morgan

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