Galactogram = Ductogram
Usually done for spontaneous unilateral bloody nipple discharge. Sometimes it is done for serous (clear) discharge.
90% of the women with unilateral bloody nipple discharge = benign intraductal papilloma, a solitary discrete intraductal mass. However if multiple masses are discovered in the duct, the more likely the diagnosis will be ductal carcinoma in situ (DCIS).
Regardless of single mass or multiple mass, a surgical biopsy (excisional biopsy) is required for diagnosis. Methylene blue dye can assist the surgeon in removing the duct in the OR.