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Background Duration and type of menopausal hormone therapy (HT) has been associated with increased breast cancer risk and the development of estrogen receptor (ER)-positive tumors. The effect of HT dose on breast cancer tumor characteristics remains undefined. We sought to determine if HT dosing regimens influence breast cancer phenotype. Methods We conducted a retrospective review of incident female...
Background It is unclear whether hormone replacement therapy (HRT), in addition to increasing risk for breast cancer, affects the type of breast cancer diagnosed. We conducted this investigation to assess whether the type of hormone used (none, estrogen, progesterone, or combined) and duration of use influences subsequent breast cancer histology. Methods We performed a retrospective cohort analysis...
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