Multiple fibroadenomas may develop in one or both breasts. The cause of these growths is unknown. They are not linked to increased risk of breast cancer. If removal is necessary, it can be done with either a local or a general anesthetic. After removal, the lump is examined by a pathologist to rule out the small chance of breast cancer.
Fibroadenomas occur most often in women under thirty, and are more common in black women.
A cyst develops in the breast when small sacs fill with fluid or semi-fluid material. The size of the cyst may fluctuate during the course of your menstrual cycle. During ovulation and before menstruation, your hormone levels change, causing breast cells to retain fluid. These lumps may be present from your very first period, or may develop in your twenties or thirties. Sometimes, the lumps feel a little sore, but they are harmless.