A small benign tumor growing in the cells lining a breast duct. Symptoms include a discharge from the nipple; the discharge may be clear and sticky, greenish yellow, or bloody. A discharge is normal in women who have recently been pregnant, but other women experiencing a nipple discharge should see their doctors right away. Because the symptoms of intraductal papilloma can resemble those of breast cancer, diagnosis will include a biopsy of the papilloma, a mammogram, and laboratory testing of the discharge.
A solitary neoplasm of the breast that occurs in the large, lactiferous ducts. A distinct neoplasm that displays a papillary histological pattern.