A ductogram (also called galactography) is a special breast imaging test that requires contrast material to be introduced into the ducts of the breast. This is a mildly uncomfortable test, which may be recommended for women with nipple discharge. A cannula is inserted into the nipple, and the contrast material (dye) is injected into the breast. X-ray images are taken after the contrast material is injected, thus enabling the ducts and anatomy of the breast, with any abnormities, to be seen. If the test is unsuccessful, a breast MRI or a surgical excision may be recommended. A ductogram takes about 1 to 1½ hours.