The most common symptoms of hyperplasia are lumps on the breast, although these lumps do not necessarily indicate hyperplasia (or, for that matter, breast cancer). In fact, 50 to 90 percent of all women, at some point in their lives before they reach menopause, experience breast pain, lumps or nipple discharge. If you have any of these conditions, please see a doctor immediately. Even if there are no symptoms, however, hyperplasia may show up during a routine breast exam or mammogram.
If you have a lump on your breast, your doctor will perform a biopsy. Based on how these cells look under the microscope, if hyperplasia exists, your doctor will classify it as either usual or atypical. In addition, hyperplasia in the breast comes in two forms: duct epithelial hyperplasia (meaning the growth is in the milk ducts) or lobular hyperplasia (the growth is in the breast’s lobules).