This condition is quite prevalent in women. The majority of these benign lesions are not associated with an increased risk of breast cancer. It usually disappears after menopause unless estrogen-replacement therapy is used.
Lumps are usually on both sides.
Solitary lumps may occur, but multiple lumps are common. Lumps may be accompanied by generalized breast pain, especially before menstrual periods. Lumps often enlarge before menstrual periods and shrink afterward. Lumps come in different sizes. When the lumps are relatively large and near the surface, they can be moved freely within the breast.