Breast Ultrasound Practice Test

A papilloma refers to a benign growth arising from a duct, and these intraductal lesions most commonly form in the major ducts right beneath the nipple, the retroareolar region. This area contains a high density of ducts that drain toward the nipple, making it the usual site for papillomas to develop. Clinically, this location also explains why papillomas often present with nipple discharge, sometimes blood-tinged, from the ductal orifice. Other sites are less characteristic for papillomas because they are not the typical ductal ducts-rich zones where these lesions arise. The upper outer quadrant is a common site for breast cancers in general, not specifically papillomas; the inframammary fold is just a lower breast border location, and the peri-areolar area is around the nipple but not as specifically associated with the subareolar ducts as the retroareolar region. So, the retroareolar area behind the nipple is the best-known location for an intraductal papilloma.