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About Klinefelter Syndrome


Klinefelter Syndrome (KS) is a condition that occurs in men who have one or more extra X chromosomes. 
The syndrome can affect boys and men at different stages of life and their physical, language, and social development.


The only symptom that we all share is one or more extra X chromosomes. The most common symptom is infertility.  Boys may be
taller than other boys their age, with more fat around the belly. After puberty, boys/teens who have Klinefelter Syndrome may have:

Smaller testes and penis

Breast growth

Less facial and body hair

Reduced muscle tone

Narrower shoulders and wider hips

Weaker bones

Decreased sexual interest

Lower energy

Shyness

Irritability

We may have learning or language problems. We may be quiet and shy and have trouble fitting in.

A genetic test called a karyotype can definitively diagnose XXY/Klinefelter Syndrome. There is no cure, but treatments are available.
It is important to start treatment as early as possible during our teenage years. With treatment and early onset,
the majority of us grow up to have successful lives.

Treatments include testosterone replacement therapy and can include breast reduction surgery, and If needed, physical therapy,
speech therapy, language development, and occupational therapy may also help.

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