Blood hormone tests predicted a woman's risk for developing postmenopausal breast cancer for up to 20 years, according to data from the Nurses' Health Study presented at the 11th Annual AACR International Conference on Frontiers in Cancer Prevention Research. "We found that a single hormone level was associated with breast cancer risk for at least 16 to 20 years among postmenopausal women not using postmenopausal hormones," said Xuehong Zhang, M.D., an epidemiologist at Brigham and Women's Hospital and an instructor in medicine at Harvard Medical School in Boston, Mass...
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