The incidence of breast cancer ranks first in female tumors. Every year, 120,000 to 150,000 breast cancer patients need observation and treatment.Reproductive-related breast cancer risk factors are essentially linked to sex hormone levels in the body; animal studies confirm the view that sex hormones can promote breast cancer. Therefore, there are various indications that sex hormones play an important role in the occurrence of breast cancer.
Endogenous and exogenous estrogens: There is consensus that knowledge of the relationship between total estrogen levels and breast cancer in postmenopausal women is present. The study found that postmenopausal women had an average of 15% to 24% higher total estrogen levels in breast cancer than healthy women. Prospective studies suggest that there is a significant positive correlation between plasma estrogen levels and the risk of breast cancer in postmenopausal women who have not used hormone replacement therapy.
Women undergo estrogen replacement therapy after menopause for various reasons. Many studies have found that supplementing exogenous estrogen increases the risk of breast cancer. However, compared with endometrial cancer, the risk is much lower.
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