Galactography or ductography (or galactogram, ductogram) is a medical diagnostic procedure for viewing the milk ducts.

Galactography is capable of detecting smaller abnormalities than mammograms, MRI or ultrasound tests.

With galactography, a larger part of the ductal system can be visualized than with the endoscopic investigation of a duct (called galactoscopy or ductoscopy).

Causes for nipple discharge include duct ectasia, intraductal papilloma, and occasionally ductal carcinoma in situ or invasive ductal carcinoma.

[2] To avoid infection, galactography should not be performed when the nipple discharge contains pus.