<unk>  is the surgical removal<unk>  of all lactiferous<unk>  under the nipple. The<unk>  of a single<unk>  is called microdochectomy, a mere incision of a mammary<unk>  (without<unk>  is microdochotomy.
Central duct excision
Radiofrequency thermocoagulation
Segmental resection
Hepatectomy
Mohs surgery
Cryoablation
Buccal fat extraction
Irving operation