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Genetic and Rare Diseases Information Center (GARD)

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Fryns syndrome

Other Names for this Disease
  • Diaphragmatic hernia, abnormal face, and distal limb anomalies
  • FRNS
  • Moerman Van den berghe Fryns syndrome
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What is Fryns syndrome?

How is Fryns syndrome inherited?

What is Fryns syndrome?

Fryns syndrome is a condition that affects the development of many parts of the body. Signs and symptoms vary widely among affected individuals. Many affected individuals have a defect in the diaphragm muscle such as a congenital diaphragmatic hernia (a hole in the diaphragm present at birth). This may allow the stomach and intestines to move into the chest, which can result in pulmonary hypoplasia (underdevelopment of the lungs). Other signs and symptoms may include abnormalities of the fingers and toes; distinctive facial features; severe developmental delay and intellectual disability; and abnormalities of the brain, cardiovascular system, gastrointestinal system, kidneys, and genitalia. Most affected individuals die before birth or in early infancy. The cause of the condition is not known, but it is thought to be genetic and appears to be inherited in an autosomal recessive manner.[1]
Last updated: 11/29/2011

How is Fryns syndrome inherited?

Although the exact cause of Fryns syndrome is not currently known (and no disease-causing gene has yet been identified), it is thought to be genetic because it tends to "run in families" and has features common to other genetic disorders. It appears to be inherited in an autosomal recessive manner.[1] This means that both copies of the disease-causing gene in each cell of the body (one copy inherited from each parent) have mutations. The parents of an affected individual are referred to as carriers, who typically do not show signs or symptoms of the condition. When two carriers of an autosomal recessive condition have children, each child has a 25% (1 in 4) risk to have the condition, a 50% (1 in 2) risk to be a carrier like each of the parents, and a 25% chance to not have the condition and not be a carrier.
Last updated: 11/29/2011

  1. Fryns syndrome. Genetics Home Reference. May 2010;