Studying the DNA of 889 people, gene hunters at the Mayo Clinic and H. Lee Moffitt Cancer Centers have identified a region on chromosome 5p that is significantly associated with dense breast tissue, a known risk factor for breast cancer.

Postmenopausal Asian women who eat a “meat-sweet” or Western diet are at greater risk of developing breast cancer than those who eat a “vegetable-soy” diet, according to a new study. The findings mark the first time an association between a Western diet and breast cancer has been identified in Asian women

Women with at least three sites of cellular atypia in breast tissue are nearly eight times more likely than average women to develop breast cancer, according to findings of a Mayo Clinic Cancer Center-led study of women with atypical hyperplasia. The findings are published in the July 1 issue of the Journal of Clinical Oncology.

It may not seem so at the time, but women who suffer through morning sickness during their pregnancies actually may be fortunate.

Women who consume higher amounts of calcium and vitamin D may have a lower risk of developing premenopausal breast cancer, according to a report in the May 28 issue of Archives of Internal Medicine, one of the JAMA/Archives journals.

According to researchers at Boston University's Slone Epidemiology Center, hair relaxers are not associated with increased risk of breast cancer in black women. The findings will be published in the May issue of Cancer Epidemiology Biomarkers & Prevention.

For the first time, scientists have used a laboratory mouse model to mimic the development of human alcohol-induced breast cancer.

A new hereditary breast cancer gene has been discovered by scientists at the Lundberg Laboratory for Cancer Research and the Plastic Surgery Clinic at the Sahlgrenska Academy in Sweden. The researchers found that women with a certain hereditary deformity syndrome run a nearly twenty times higher risk of contracting breast cancer than expected.