A new report shows a growing number of men are opting for aggressive surgery, despite limited research on its benefits.
Study on mice finds that an irregular sleep pattern speeds up tumor growth.
Jolie, 39, said she had gone public with her decision to tell other women about the options available to them.
A study found that women who take high-estrogen contraception have a higher rate of developing breast cancer.
The news comes as more and more women are choosing the aggressive surgery upon breast cancer diagnosis