A new father has just been told that his infant has trisomy 18.Which identifying physical feature is unique to an infant with this genetic disorder?

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Quizplus · Accepted Answer

Trisomy 18, also known as Edwards syndrome, is characterized by rocker-bottom feet and clenched hands with overlapping fingers, which are unique identifying physical features. Microcephaly and capillary hemangiomas are associated with certain other genetic disorders, while epicanthal folds and a simian crease are common in Down syndrome. Oblique palpebral fissures and Cri du chat syndrome are not associated with trisomy 18.

A New Father Has Just Been Told That His Infant