gynecology and obstetrics
Nipple Discharge
Etiology of Nipple Discharge
 10% of cases. The rest result from benign ductal disorders (eg, intraductal papilloma, mammary duct ectasia, Etiology ), endocrine disorders (eg, pituitary tumor), liver disorders, breast abscesses or infections, or use of certain drugs. Of these causes, intraductal papilloma is probably the most common; it is also the most common cause of a bloody nipple discharge without a breast mass. 