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- Klinefelter syndrome - Symptoms and causes - Mayo Clinic
Klinefelter syndrome is a common condition that results when a person assigned male at birth has an extra copy of the X sex chromosome instead of the typical XY
- Klinefelter Syndrome: What It Is, Symptoms Treatment
Klinefelter syndrome is a common genetic condition in which males have an additional X chromosome Symptoms may include breast growth, infertility, osteoporosis and learning difficulties
- Klinefelter syndrome - NHS
Read about Klinefelter syndrome - a condition in which male babies are born with an extra X chromosome Find out about the symptoms, causes and treatments
- Klinefelter Syndrome (KS) - NICHD
KS describes a set of physical, language, and social development symptoms in males who have an extra X chromosome Its main feature is infertility Outward signs of KS can be subtle, so symptoms often are not recognized and may not be treated in a timely manner
- Klinefelter Syndrome - Johns Hopkins Medicine
Most men are born with a pair of XY chromosomes, while most females are born with pair of XX chromosomes Klinefelter syndrome occurs when a male is born with an extra X chromosome Thus a male with Klinefelter has XXY instead of the usual XY pair
- Klinefelter Syndrome – Symptoms and Causes | Penn Medicine
Klinefelter syndrome is a genetic condition that causes an extra X chromosome in people assigned male at birth Also known as XXY syndrome, around one person in every 600 is born with this condition
- Klinefelter syndrome
Klinefelter syndrome (KS) is a chromosome variation affecting around 1 in 660 males in which an extra X chromosome is present, resulting in a genetic karyotype of 47,XXY
- Johns Hopkins Klinefelter Syndrome Center
Most males with Klinefelter syndrome, also called XXY males, have two X chromosomes instead of one The extra X usually occurs in all body cells Sometimes the extra X only occurs in some cells, resulting in a less severe form of the syndrome This is called a mosaicism, and is very common
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