What is ductoscopy Ductal endoscopy is the insertion of an endoscope with a diameter of less than 1mm through the opening of the breast ducts in the nipple, and a medical monitor that looks into the end of the breast ducts while observing the situation in the breast ducts, allowing clear observation of the breast duct walls and luminal secretions, and describing the color, size, shape, smoothness, etc. if there is an occupying lesion. Who needs ductoscopy and treatment? In patients with nipple discharge of all colors, especially bloody discharge, the incidence of intraductal neoplasia is more than 90%; in patients with colorless and yellow discharge, more than half of them are intraductal neoplasia; in addition, some cases of white discharge are due to intraductal masses. In addition, some of the patients with white discharge are due to intraductal masses. All intraductal tumors require further surgical treatment. The significance of lactoscopy is to clarify the cause of nipple discharge, refine the indications for surgery, reduce unnecessary surgery, narrow the scope of surgery, and accurately remove the lesion. Lacteal duct lavage, cytologic examination, diagnosis, and certain therapeutic effects Irrigation of diseased ducts and injection of antibiotics and other drugs Removal of large flocculent masses or unblocking of ducts Accurate excision of lesions by locating tumorous lesions with copper wire Minimally invasive excision of diseased ducts with the aid of lactoscopy