The incidence of breast cancer because what?
The incidence of breast cancer currently unknown reasons, I have some impact on the incidence of factors described below :
(1) Age : breast tumors occurred at the age of 40 to 60, accounting for all patients 75% before the age of 20 patients with uncommon.
(2) ovarian function : Breast subject to the regulation of ovarian hormones. Estrogen is the basic development of breast stimulating hormone, is the incidence of breast cancer one of the prerequisites. Some people believe that estrone and estradiol with the unusual increase in the lack of Estriol is the incidence of breast cancer one of the reasons, has been on clinical examination with the support of the animal experiments proved. But male breast cancer patients with rare female about 1% of the patients, would like to note with men without the ovarian hormones.
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