Mammary ductoscopy is a useful tool in the evaluation of patients with nipple discharge. Although the most common cause of nipple discharge is an intraductal papilloma, nipple discharge can be the presenting symptom for cancer. Our experience revealed a papilloma rate of 45% (42 of 93), cancer rate of 6.5% (6 of 93), and an atypia rate of 6.5% (6 of 93) among the patients with nipple discharge. Mammary ductoscopy allows for accurate visualization, analysis, and excision of intraductal abnormalities. Many deeper intraductal abnormalities could be missed by blind surgical excision.
Breast cancer is the most frequently diagnosed malignancy among American women. It is the second most common cause of cancer death. Genetic analysis using comparative genetic hybridization (CGH) has shown evidence that the majority of breast cancers, approximately 85%, begin in the ductal epithelium with normal cells progressing to atypia and finally to carcinoma. Mammary ductoscopy, also referred to as the intraductal approach, is a new tool that allows direct visualization of the breast ductal system. It enables one to sample the ductal epithelium and may allow identification of early changes cytologically as well as potentially play an important role in aiding surgical excision. This may aid in detection of breast masses long before they are palpable or visible via mammography. Mammary ductoscopy may have a role in the evaluation of women with nipple discharge, high-risk women, or limiting the amount of tissue removed in breast conservation surgery for cancer.
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