Estrogen therapy and risk of breast cancer in postmenopausal women

In Brief Objective: Several randomized trials and observational studies show that the use of hormone therapy (HT) increases the risk of breast cancer (BC). The aim of this study was to assess the effects of exposure to both HT and oral contraceptives (OCs) on BC risk in postmenopausal women, all residing in the same metropolitan area. Methods: Data regarding a series of 238 consecutive postmenopausal women with infiltrating ductal carcinoma...