Another cause of nipple discharge. Mammary duct ectasia with periductal mastitis.

Abstract Mammary duct ectasia with periductal mastitis is a distinct, benign form of breast pathology that is different from fibrocystic disease of the breast. There are no known increased risk factors for developing breast cancer from this entity. The treatment is local surgical excision which relieves symptoms and does not significantly alter the appearance of the breast.