Marriage menstrual factors
Unmarried is one of the factors leading to breast cancer risk. Late marriage and marriage duration of a short female, breast cancer incidence rates were generally higher. Primiparous age of 30 years old will increase the risk of breast cancer. On the occurrence of breast cancer breast-feeding has a protective effect, there are scholars to study the acceptability of lactation in five years or more, can reduce the risk of breast cancer by 30%. Studies have shown that the age of menarche age of 12 who after the age of 13 than in those who suffer from an increased risk of breast cancer four times. 45-year-old post-menopausal than in post-menopausal 50-year-old persons, the risk of breast cancer by 30%.
Genetic factors
The existing breast cancer risk factors, family history is very important. Existence of the following conditions should be highly suspected breast cancer in women with genetic predisposition: the more paternal or maternal relatives with breast cancer, while there is a family history of breast and ovarian cancer, there are bilateral or family history of early breast cancer.
Benign breast disease
The risk of breast cancer and benign breast disease, histological type of the currently widely used “non-proliferative” and “proliferative” lesions to distinguish between different risk. Non-proliferative lesions, does not increase the incidence of breast cancer, while the lesions occurred on the relative risk of breast cancer increased, and in order to associated with atypical lobular or ductal hyperplasia is even worse.
Lifestyle factors
Breast cancer mortality and per capita fat consumption was directly proportional relationship. Expert studies suggest that human health status, 60% and lifestyle-related, while in the category of major lifestyle, dietary factors also accounted for the majority. Scientists, the high incidence of breast cancer diet composition of U.S. residents with a lower incidence of breast cancer, diet composition of China’s population comparison analysis found that total fat consumption per person per day, Americans are 2.5 times the Chinese people.
Studies have shown that meat. Omelette. Butter. Cheese. Sweets. Animal fats such as increase the risk of breast cancer, while the green vegetables. Fruit. Fresh fish. Low-fat dairy products may reduce the risk of breast cancer.
Other factors
In addition to family history. Benign disease history, the risk of breast cancer are age at menarche. The beginning of middle age. Parity. Menopausal age, in addition, the side contralateral breast cancer after breast cancer risk is also increasing.
