AAP News Vol. 10 No. 1 January 1994, p. 2
© 1994 American Academy of Pediatrics
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Help for male Infants born with extra X chromosome

LAURIE LARSON

The National Institute of Child Health and Human Development (NICHD) has issued a publication illuminating strategies for assisting normal development among male children born with an extra X chromosome.

Understanding Klinefelter Syndrome: A Guide for XXY Males and Their Families outlines the results of an XXY male NICHD study stressing that "Klinefelter syndrome" is no longer a favored term for this most common sex chromosome disorder, since breast enlargement, sparse body and facial hair and small testes are not common characteristics as previously thought. "XXY male" is the preferred terminology.