Breast cancer is ductal breast cancer in epithelial, is a common cancer of women. In many Western countries, the incidence of breast cancer for women of the first. In China, female breast cancer accounted for the first two. According to relevant data, the incidence rate in women 23/10 million population, while the male population was only 000 0.49/10. Man breast cancer accounts for about 1% of the entire breast cancer around. Most of breast cancer occurred in 40 to 60 years old, or pre-and post-menopausal women, particularly in the 45 to 49-year-old and 60 to 64-year-old among the highest incidence rate. What is the cause of breast cancer » The incidence of breast cancer with the following factors: (1) hormone secretion disorder: the so-called hormone secretion disorder mainly refers to estrogen secretion disorder. Because the high incidence of breast cancer, aged 40 to 60-year-old woman. Stage is the women in this age of estrogen secretion disorders, estrogen is high time. As in the secretion of estrogen increase, which would make the epithelial cells of the breast ductal hyperplasia and cancerous. (2) reproductive and lactating: In recent years through a lot of investigation proved that no birth or a birth, they seldom lactating women than breast cancer occurred many times lactating, breastfeeding women and more long time. This shows that more than childbirth, breastfeeding and more likely to happen is to increase the chance of breast cancer. (3) fiber cystic breast disease: the above-mentioned such a disease, it is a pre-cancerous lesions, easily into breast cancer. (4) genetic factors: performance in a major family history of breast cancer. According to foreign data, positive family history can be expressed as two forms: as a mother suffering from breast cancer, his daughter is also a good breast cancer, breast cancer occurred in this amenorrhea, often bilateral; another for the His mother had not suffering from breast cancer, but in a family, there are at least two sisters suffering from breast cancer, this family in the incidence of breast cancer than no family history of breast cancer in the family a high incidence of 2 to 3 times, and This occurred in more than breast cancer after menopause, often unilateral.
