Breast fibroadenoma is the most common benign tumor of the breast, which is commonly found in women of childbearing age between 20 and 40 years old. Daily patients can feel no discomfort, it does not hurt or only has a slight swelling or dull pain, and this pain is not related to the size and menstrual cycle. What are the dangers of mammary fibroadenoma to women? 1.It may bring pain without pain degree. 2.After pregnancy, the tumor may increase rapidly, thus compressing the surrounding normal glands and leading to poor breastfeeding after delivery. 3.May be combined with other benign or malignant breast tumors in breast fibroadenoma. 4. If the tumor exists for a long time, a small number of patients may change from benign fibroadenoma to malignant breast sarcoma. Can fibroadenoma of breast become cancerous? Most of the breast fibroadenomas are not cancerous, but patients with early onset, long growth time and rapid increase in size in a short period of time should pay attention to the possibility of malignant transformation. At present, the information on fibroadenoma of breast is mainly based on surgery, and drugs are basically ineffective. Because most fibroadenomas increase rapidly during pregnancy, we recommend surgery before pregnancy as much as possible. In addition to the traditional open surgery for fibroadenoma, there is also the minimally invasive breast surgery that has been developed in recent years.