A study looking at tamoxifen to prevent breast cancer in premenopausal women (TAM-Prev)

This study aimed to find out how many women who had a high risk of developing breast cancer had considered using tamoxifen to prevent it.

The study was for women who had not been through the menopause. The researchers also wanted to see if a substance in the blood called a biomarker can be used to find out which women may benefit from having tamoxifen.