article_snippet.sent: If we have more women who believe we have more women who believe they are at increased risk are at increased risk,' Frances Visco of the National Breast Cancer Coalition says, 'we will have more women removing healthy body parts. '
article_snippet.sent: Tamoxifen is the main hormonal therapy drug given to women who have not been through the menopause, and is usually taken for five years or longer after treatment for breast cancer.
article_snippet.sent: Most breast cancer tumours rely on the hormone oestrogen to grow, and tamoxifen blocks oestrogen from reaching the cancer cells.
article_snippet.sent: This means the cancer either grows more slowly or stops growing altogether.
article_snippet.sent: As part of a study, Swedish and British researchers looked at data from 1,090 breast cancer patients, in a follow up of a similar study carried out two years ago.