Klinefelter's Syndrome Directory
Klinefelter's syndrome is a male genetic disorder in which the male body exhibits some female characteristics. These might include enlarged breasts and hips, a higher-pitched voice, and more. Some men, however, do not have any noticeable symptoms. Treatments include testosterone, therapies, and other support. Follow the links below to find WebMD's comprehensive coverage about how Klinefelter's syndrome is caused, diagnosed, treated, and much more.
Klinefelter Syndrome (XXY Syndrome)
Klinefelter syndrome, also known as XXY syndrome, is a condition in boys and men that’s caused by an extra X chromosome. It can affect physical and mental development.
What Is Gynecomastia?
When a man’s breasts swell, a hormone imbalance may be the cause. Learn more about gynecomastia and how it’s treated.