Fragile X Syndrome


MSH: A condition characterized genotypically by mutation of the distal end of the long arm of the X chromosome (at gene loci FRAXA or FRAXE) and phenotypically by cognitive impairment, hyperactivity, SEIZURES, language delay, and enlargement of the ears, head, and testes. INTELLECTUAL DISABILITY occurs in nearly all males and roughly 50% of females with the full mutation of FRAXA. (From Menkes, Textbook of Child Neurology, 5th ed, p226),CSP: X-linked recessive disorder characterized by mental retardation and large head, jaw, ears, and testes; premutation alleles in unaffected carriers give rise to significantly amplified repeats in affected progeny.,MEDLINEPLUS: <p>Fragile X syndrome is the most common form of inherited <a href=''>mental retardation</a>. A problem with a specific gene causes the disease. Normally, the gene makes a protein you need for brain development. But the mutation causes a person to make little or none of the protein, whic

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