Hormonal therapy for menopause and breast-cancer risk by histological type: a cohort study and meta-analysis.
BACKGROUND: Little information is available on how the risk of breast cancer associated with the use of hormone therapy for menopause varies by histological type. We aimed to describe such associations for eight histological types of breast cancer. METHODS: Analyses are based on 1 031 224 postmenopausal women recruited in 1996-2001 into a nationwide UK cohort study, and followed for incident cancer and death. Relative risks associated with use of hormone therapy were estimated for eight histo...Expand abstract
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