Klinefelter's Syndrome Facts
- Klinefelter's Syndrome occurs in about 1 out of 500 – 1000 males.
- Small undeveloped testicles are present in all KS men.
- There is a slight increase in risk of KS in pregnancies after the age of 35.
- In Australia approximately 60% of males with KS are undiagnosed.
- KS is the most common cause of male hypogonadism.
- Treatment for KS is the prescribing of androgen replacement therapy starting at adolescence.
- Treatment is life-long.
Possible complications include:
- Attention deficient hyperactivity disorder.
- Autoimmune disorders such as lupus, rheumatoid arthritis, and Sjogren syndrome.
- Breast cancer in men.
- Learning disabilities, including dyslexia, which affects reading.
- A rare type of tumor called an extragonadal germ cell tumor.
- Lung disease.
- Varicose veins.
See your doctor