Conditions + Treatments

Fragile X Syndrome in Children

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Contact the Fragile X Program

What is fragile X syndrome?

Fragile X syndrome is a genetic condition that can cause a range of learning and developmental problems. These can include:

Some children with fragile X may also have mildly characteristic features such as prominent ears.

Fragile X is more common in boys than girls, and boys with fragile X usually have more severe symptoms.

Care for fragile X syndrome

At the Boston Children’s Hospital Fragile X Program, we provide specialty care for children and adults with fragile X. We’re also actively involved in doing research to learn more about the condition and to find better treatments.

We are grateful to have been ranked #1 on U.S. News & World Report's list of the best children's hospitals in the nation for the third year in a row, an honor we could not have achieved without the patients and families who inspire us to do our very best for them. Thanks to you, Boston Children's is a place where we can write the greatest children's stories ever told.”
- Sandra L. Fenwick, President and CEO

Boston Children's Hospital 300 Longwood Avenue, Boston, MA 02115 617-355-6000 | 800-355-7944

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