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Trisomy 13 survival can exceed 1 year. (Seen in 8% of Affected Infants).
BALTIMORE -- About 8% of infants born with either trisomy 13 or trisomy 18 survive longer than 1 year, Dr. Sonja A. Rasmussen said at the annual meeting of the American Society of Human Genetics.
"The perception among most physicians is that these children don't live very long," and, in fact, the median duration of survival was 7-10 days for infants with trisomy 13 and 10-15 days for infants with trisomy 18, she said.
"But the important thing for physicians to keep in mind when counseling parents is that some children live longer. Some can live longer than a year, and there are anecdotal reports of children living into their teens," said Dr. Rasmussen, a clinical geneticist at the National Center on Birth Defects and Developmental Disorders in Chamblee, Ga.
She and her associates analyzed survival statistics using population-based data sets. One set included data from 1969-1999 on 69 live-born infants with trisomy 13 and 106 live-born infants with trisomy 18. The data were collected by the Metropolitan Atlanta Congenital Defects Program.
The second data set included death certificate information in the Multiple-Cause ...
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