MONDO_0021097 (intraductal breast papilloma) is a benign papillary neoplasm that arises anywhere in the ductal system of the breast. It is characterized by fibrovascular structures lined by benign epithelial and myoepithelial proliferations. Intraductal breast papillomas are classified as central, when they arise in large ducts, or peripheral, when they arise in the terminal ductal lobular units. Also known as: breast papilloma, duct papilloma of breast, duct papilloma of the breast, ductal breast papilloma, intraductal papilloma of breast, intraductal papilloma of the breast, mammary duct papilloma, papilloma of breast.