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Diseases

Genetic and Rare Diseases Information Center (GARD)

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CHARGE syndrome


Other Names for this Disease
  • CHARGE association
  • Coloboma, heart anomaly, choanal atresia, retardation, genital and ear anomalies
  • Hall-Hittner syndrome
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Inheritance


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Is CHARGE syndrome inherited?

CHARGE syndrome is usually not inherited, typically occurring due to a new (de novo) gene mutation in the affected individual. However, rare familial cases inherited in an autosomal dominant manner have been described.

To our knowledge, all individuals who have a CHD7 mutation have some features of CHARGE syndrome (i.e. penetrance is 100%). In rare instances, one parent may have mild features, and the family history may appear to be negative because of failure to recognize the mild features of the condition.

The risk to the siblings of an affected individual depends on the genetic status of the individual's parents. If a parent of an affected child also has CHARGE syndrome, the risk for each sibling to inherit the condition is 50%. If neither parent is affected, the risk to each sibling of an affected child is estimated to be 1%-2%, most likely attributable to germline mosaicism. Prenatal diagnosis for pregnancies at increased risk is possible if the disease-causing CHD7 mutation has been identified in an affected family member.[1]
Last updated: 3/11/2013

References
  1. Seema R Lalani, Margaret A Hefner, John W Belmont, and Sandra LH Davenport. CHARGE syndrome. GeneReviews. February 2, 2012; http://www.ncbi.nlm.nih.gov/books/NBK1117/. Accessed 3/8/2013.