This lactating breast shows greatly expanded lobules consisting of variably-sized glands. The patient was a 28 y/o nursing woman who presented with a breast "mass."
About the Disease
Lactating adenoma is a benign, non-neoplastic process that may present as a mass lesion during pregnancy or lactation. It may also occur in ectopic breast tissue (axilla, chest wall, or vulva). It is composed of compact lobules lined by actively secreting cuboidal cells with vacuolated cytoplasm.