Ectopic Breast Tissue


D efinition —Adnexal tissue with mammary differentiation in the vulvar region.

Clinical Features

Epidemiology

  • Rare.

  • The most popular theory is that it reflects a rudiment of caudal mammary buds (in the “milk line”) that did not completely regress during development.

  • Other theories include mammary-like anogenital glands that concentrate in the labial sulcus and give rise to “ectopic breast tissue.”

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