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Klinefelter Syndrome

Klinefelter syndrome is a congenital condition (present at birth) that affects about 1 in 1,000 men. Normally the cells in men’s bodies have a single X chromosome along with a Y chromosome, while women’s cells have 2 X chromosomes. Men with this condition have cells with a Y chromosome plus at least 2 X chromosomes (but sometimes more).

Men with Klinefelter syndrome also have small testicles (smaller than usual). Often, they are infertile because they are unable to produce functioning sperm cells. Compared with other men, they have lower levels of androgens (male hormones) and more estrogens (female hormones). For this reason, they often develop gynecomastia (benign male breast growth).

Some studies have found that men with Klinefelter syndrome are more likely to get breast cancer than other men. One study of men with this syndrome found that the risk of getting breast cancer was about 1% (1 in 100). But this is a hard area to study because these are both uncommon problems, and it is hard to collect enough cases to be sure. The risk seems to be increased, but overall it is still low because this is such an uncommon cancer, even for men with Klinefelter syndrome.

 


Diagnosis and Tests of male breast cancer  

The Pathology Report (Male Breast Cancer)

Treatment & Stages of male breast cancer

Coping and support for male breast cancer

 


Related Topics

Benign breast conditions

General breast cancer terms

Types of breast cancer in men


References

http://www.cancer.org/cancer/breastcancerinmen/detailedguide/breast-cancer-in-men-what-is-breast-cancer-in-men

http://www.breastcancer.org/symptoms/types/male_bc

http://www.cancerresearchuk.org/about-cancer/type/rare-cancers/rare-cancers-name/breast-cancer-in-men

http://www.mayoclinic.org/diseases-conditions/male-breast-cancer/basics/coping-support/con-20025972


 

 

Oncologists, Breast Surgeons are the specialists who deal with the breast cancer

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