Sign in  |  Register

Illustrated Health Encyclopedia
[an error occurred while processing this directive]

Ency. home > Disease > T > Trisomy 18

Trisomy 18   

Overview | Symptoms | Treatment | Prevention

Alternative names:

Edwards syndrome

Definition:

Trisomy 18 is a syndrome associated with the presence of a third (extra) number 18 chromosome.

Causes and Risks

Trisomy 18 is a relatively common syndrome affecting approximately 1 out of 3,000 live births and affecting girls more than three times as often as boys. Multiple abnormalities are associated with the presence of an extra number 18 chromosome, many which are not compatible with more than a few months of life. Few infants survive beyond the first year.

Common findings include low birth weight, mental retardation, low-set ears, malformed ears, small jaw (micrognathia), hand abnormalities, congenital heart disease, hernias, and cryptorchidism. There may be many other abnormalities noted.

Ency. home > Disease > T > Trisomy 18

[an error occurred while processing this directive]