A breast cyst, an oval or round fluid-filled sac, may move slightly when you press on it. Breast cysts are fluid-filled sacs inside the breast. They are usually noncancerous benign. You may have one or multiple breast cysts.
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An intraductal papilloma is a small, benign non-cancerous , wart-like growth on the lining of the milk duct that may cause nipple discharge. Intraductal papillomas are usually close to the nipple, but they can sometimes be found elsewhere in the breast. Whether you have one intraductal papilloma or several known as intraductal papillomatosis , your risk of developing breast cancer may be slightly increased. Intraductal papilloma makes up less than 10 percent of benign breast lesions and less than 1 percent of malignant cancerous breast tumors. Intraductal papillomas are different from papillary carcinoma of the breast, also known as intraductal papillary carcinoma—a rare type of breast cancer accounting for less than 1 percent of all invasive breast cancers. There are two different types of intraductal papillomas, as well as one other condition that is closely related.
U.S. Food and Drug Administration
A breast duct papilloma is a benign noncancerous growth in a breast milk duct. It is the most common cause of spontaneous discharge from the nipple. This discharge may be clear or bloody. A breast duct papilloma also may produce a small lump that you can feel next to or behind the nipple. A breast duct papilloma may not be identified on routine screening mammography.
Many girls look forward to the first signs of breast development and view it as a sign that childhood is behind them. As a parent, that moment may seem to arrive too soon, leaving you wondering if your daughter is developing ahead of the curve. While each girl develops at her own rate, knowing what to expect and the age range when it normally occurs makes the transition into puberty easier for both of you.