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Definition of «Trisomy 18 syndrome»

Trisomy 18 syndromeTrisomy 18 syndromeTrisomy 18 syndromeTrisomy 18 syndrome

Trisomy 18 syndrome: There are three instead of the normal two chromosomes #18. Children with this condition have multiple malformations and mental retardation due to the extra chromosome #18. The children characteristically have low birth weight, small head (microcephaly), small jaw (micrognathia), malformations of the heart and kidneys, clenched fists with abnormal finger positioning, and malformed feet. The mental retardation is profound with the IQ too low to even test. Nineteen out of 20 (95%) of these children die before their first birthday. The condition is also called Edwards syndrome in honor of the British physician and geneticist John Edwards who discovered the extra chromosome in 1960.

For More Information «Trisomy 18 syndrome»

  • Trisomy 18: MedlinePlus Medical Encyclopedia

    Causes. Trisomy 18 is a relatively common syndrome. It is three times more common in girls than boys. The syndrome is caused by the presence of extra material ...

  • Trisomy 18 Foundation: Home

    edwards syndrome, edward syndrome, trisomy, what is trisomy 18, trisomy 18 pictures, trisomy 18 facts, partial trisomy 18, trysomy 18, trisomi 18, trisomy 19, trisomy 18 ...

  • Trisomy 18 Foundation:

    Trisomy 18 is also called Edwards syndrome (or Edward's syndrome) and occurs in about 1:3000 live births. Unlike Down syndrome, Trisomy 18 is usually fatal, with most of ...

  • Edwards syndrome: Information from Answers.com

    Edwards' syndrome is also referred to as trisomy 18, trisomy E, and trisomy 16–18. It is the second most common trisomy, after trisomy 21 (Down syndrome).

  • Trisomy 18 - Information About Trisomy 18

    Information about Trisomy 18, also called Edwards syndrome, including its symptoms, diagnosis, and treatment.

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