Metformin may affect risk of breast cancer in women with type 2 diabetes
E-Mail A study of 44,541 women has found that there appears to be no association between type 2 diabetes and developing breast cancer overall. This may be because most women in the study with type 2 diabetes were taking metformin, a medication widely used to treat type 2 diabetes, whose actions may help to reduce the risk of developing oestrogen positive (ER-positive) breast cancer. ER-positive breast cancer (cancer that has receptors on cell surfaces for the hormone oestrogen) accounts for about 80% of breast cancer diagnosed in the USA. Associations uncovered in the study suggested that...