The cancer rate of simple breast enlargement is 0.1%, which is not terrible, so there is no need to be nervous. The risk of breast cancer in women with cystic hyperplasia is two to four times higher than that of the average woman. Although mammary gland hyperplasia is a benign lesion, it has the same pathogenesis as breast cancer, and a lot of studies have confirmed the close relationship between the two, i.e. normal → hyperplasia → atypical hyperplasia → carcinoma in situ → invasive cancer. Therefore, we should attach great importance to breast hyperplasia and strive for early examination, early detection and early treatment. Especially if you have a family history of breast cancer or are a member of a family with high incidence of cancer, you should pay attention to it.