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New Gene Test May Predict Cleft Lip or Palate

Genetic Pattern Linked to About 12% of the Common Birth Defects

WebMD Health News

Aug. 18, 2004 -- A gene test may allow researchers to determine which parents are more likely to have a second child with a cleft lip and palate, according to a new study.

Cleft lip with or without cleft palate is one of the most common types of birth defects worldwide, and one of the most visible. The defects develop during fetal development and are thought to be the result of a mix of inherited and environmental factors.

A cleft lip occurs when the tissues in the upper jaw and lip do not join as expected during development. It often occurs in conjunction with a cleft palate, which is the result of a similar developmental abnormality in the roof of the mouth.

Researchers say about one in 600 children in the U.S. is born with isolated cleft lip and palate, or a cleft lip or palate that occurs without any other birth defects. Although the condition is usually correctible, it requires several surgeries at great emotional and economic cost to the family.

In their study, researchers say they have developed a gene test that applies to about 12% of isolated cleft lip and palate cases and can help predict which families with a history of the birth defect are more likely to have another child with cleft lip or palate.

"This study shows that we've reached a point where it's possible to take blood samples from parents, test certain genes, and determine whether their risk for a second child with cleft lip or palate is, say, 1 or 20 percent," says researcher Jeffrey Murray, MD, a scientist at the University of Iowa, in a news release. "Now is the time to begin thinking about how best to apply these types of tests clinically and ensure that they truly benefit the families and their children."

Genetic Pattern Linked to Cleft Lip and Palate

In the study, published in The New England Journal of Medicine, researchers used an international database of 1,316 families with a child with cleft lip or palate and searched for a genetic pattern associated with the birth defect.

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