How is mammary duct ectasia in pediatric breast disorders diagnosed and treated?

Updated: May 03, 2021
  • Author: Harsh Grewal, MD, FACS, FAAP; Chief Editor: Robert K Minkes, MD, PhD  more...
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Mammary duct ectasia is a benign lesion of the breast that consists of dilation of the mammary ducts, periductal fibrosis, and inflammation. This entity has been described in infants, prepubertal boys and girls, and adult men and women. The patient presents with nipple discharge, which may be bloody. In children and adolescents, the lesion is usually unilateral. Infectious and inflammatory causes have been implicated in the etiology of mammary duct ectasia.

Findings on US are usually suggestive, revealing dilated mammary ducts radially located around the nipple. The process is usually self-limited; therefore, surgery is not recommended if the diagnosis is certain. [24, 17]

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