The excision of a single duct is called microdochectomy, a mere incision of a mammary duct (without excision) is microdochotomy.
[2] It is also indicated if there is bloody nipple discharge in patients beyond childbearing age.
[3] Duct excision may be indicated for the treatment of recurrent breast abscess and mastitis,[4] and the total removal of all ducts from behind the nipple has been recommended to avoid further recurrence.
[5] In particular if the patient wishes to preserve breastfeeding ability,[6] the condition of the mammary duct system is investigated by means of galactography (ductography) or ductoscopy in order to determine whether the excision of a single duct (microdochectomy) would be sufficient.
[7] A circumareolar cut (following the circular line of the areola) is made, the ducts are divided from the underside of the nipple, and the surrounding breast tissue is removed to a depth of 2–3 cm behind the nipple-areola complex.