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 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
Less facial and body hair
Reduced muscle tone
Narrower shoulders and broader hips
Decreased sexual interest
We may have learning or language problems. We may be quiet and shy and need help fitting in.
A genetic test called a karyotype can definitively diagnose XXY/Klinefelter Syndrome.
There is no cure, but treatments are available.
Starting treatment as early as possible during our teenage years is essential.
With treatment and early onset, most of us grow up to have successful lives.
Treatments include testosterone replacement therapy, breast reduction surgery, and, If needed,
physical therapy, speech therapy, language development, and occupational therapy may also help.