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fragile X syndrome

Fragile X syndrome is caused by a defective gene on the X sex chromosome.  This is the most common inherited form of mental retardation.  Males are more likely to have the disorder.  


Normally, the gene makes a protein required for brain development. The mutation causes a person to make little or none of the protein, which results in the symptoms of Fragile X.


Symptoms may include:

  • mental retardation
  • difficulty interacting socially
  • avoiding eye contact
  • hand biting

Treatment may include:


  • educational therapy
  • behavioral therapy
  • physical therapy
  • medication

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Robert Wood Johnson University Hospital Hamilton Hamilton. Phone: 609-586-7900 Physician Referral: 609-584-5900.

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