Role of immediate injection of methylene blue after fiberoptic ductoscopy in selective ductectomy for patients with pathological nipple discharge

FDS is an effective and feasible examination for PND patients with negative imaging results. Immediate injection of methylene blue after FDS allows clear identification of discharging ducts and intraductal lesions without overflow of methylene blue. This approach may be useful in guiding selective ductectomy for the detection of early breast cancer.