About one in to 1, boys are born with Klinefelter's syndrome the presence of an extra X chromosome, the female sex chromosome , which can cause gynecomastia. About Cancer generously supported by Dangoor Education since Featured Issue Featured Supplements. However, one meta-analysis notes that many of these claims are supported by poor quality evidence. While gynecomastia can be embarrassing, it rarely has a serious cause.
Ran D. Research suggests that in men taking bicalutamide it can:. We need more research to find out. Please review our privacy policy. Advertising on our site helps support our mission. Disclaimer: As a service to our readers, Harvard Health Publishing provides access to our library of archived content.
