Intraductal papillomas of the breast are benign lesions with an incidence of approximately 2-3% in humans. They result from abnormal proliferation of the epithelial cells lining the breast ducts.Two types of intraductal papillomas are generally distinguished. The central type develops near the nipple. They are usually solitary and often arise in the years nearing menopause. On the other hand, the peripheral type are often multiple papillomas arising at the peripheral ducts, and are usually found ...
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