children s health issues
Klinefelter Syndrome
Introduction
Klinefelter syndrome is a Overview of Sex Chromosome Abnormalities in which boys are born with two X chromosomes, instead of one, and one Y (XXY). Klinefelter syndrome occurs when a boy has one extra X chromosome. Boys may have learning disabilities, long arms and legs, small testes, and sometimes enlarged breasts. The diagnosis is suspected at puberty when most of the symptoms develop. Treatment withtestosteronemay be of benefit to some people. Chromosomes are structures within cells that contain The Sex chromosomes determine whether a fetus becomes male or female. A pair of X and Y chromosomes (XY) results in a male, and a pair of X and X chromosomes (XX) results in a female. Klinefelter syndrome is the most common sex chromosome disorder. Most boys inherit the extra X chromosome from their mother. 