A new report adds weight to the idea that recurring breast cancer may be related to which hormones are used in therapy for women after menopause. One trial, called HABITS, was halted in 2003, after women receiving the hormones estrogen and progestogen showed an increased risk of breast cancer recurring, compared to women not receiving hormones. But a second study, the Stockholm trial, using a different therapy concentrating on estrogen, had no increase in breast cancers, according to a paper appearing in Wednesday’s issue of the Journal of the National Cancer Institute.
