What is the main cause of breast cancer

The exact cause of breast cancer has not been determined. Because the etiology of breast cancer may be related to a variety of factors, therefore, can only say that the incidence of breast cancer may be related to some of the following factors:

(1) Genetic susceptibility: a family history of clinical data of the survey indicate that there is a family history of breast cancer incidence is higher than those without family history. In particular, bilateral breast cancer patients and age of onset of the smaller of these women the risk of breast cancer occurred for nine times that of women in general may be related to genetic factors related to breast cancer susceptibility has the right physical and internal lesions.

(2) endocrine factors: endocrine disorders are one of the causes of breast cancer. As the breast long-standing abnormal endocrine hormone stimulation, resulting in cancerous breast tissue, in which estrogen and progestin breast malignancy most closely with the two endocrine hormone. This point has been successively a number of clinical, pathological and confirmed by physiologist.

(3) viral factors: virus-like particles can be transmitted through breast-feeding, leading to breast cancer occur, this point has been adopted by more confirmed by animal experiments, so that some scholars speculated that the virus may be the cause of breast cancer, but epidemiological evidence is not sufficient , to be further studied.

(4) Other factors: the body’s anticancer immune function, so that anti-cancer factor suppressed immune function; and the trauma of breast stimulation, there is radiation damage, which have reported prone to breast cancer.