Definition of Breast discharge

Breast discharge: The spontaneous flow of fluid from the nipple at any time other than during nursing. This can be due to an unrecognized pregnancy, trauma, surgery, overexercise, or certain drugs. It can also be due to cirrhosis of the liver, false pregnancy (pseudocyesis), kidney failure, disorders of the spinal cord, or a prolactinoma, a benign pituitary tumor that secretes the hormone prolactin stimulating milk production.

Also called galactorrhea. Includes witch's milk.


Last Editorial Review: 6/14/2012

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