A thin, sterile, semi-rigid or rigid metal tube that is inserted into the nipple of the female breast to inject a contrast medium into the lactiferous ducts to enhance their visualization during a radiographic procedure. It is typically made of high-grade stainless steel and is designed with a blunt distal tip; it has a connector at the proximal end for attachment to a device that propels the contrast medium. This metal tube is typically used to help define the cause of nipple discharge from intraductal abnormalities such as neoplasms, ductal ectasia, or fibrocystic changes. This is a single-use device.