Source:http://linkedlifedata.com/resource/umls/id/C0238031
NCI: A benign, malignant, or borderline circumscribed biphasic neoplasm that arises from the breast. It usually affects middle-aged women. It is characterized by the presence of a double layer of epithelial cells that are arranged in clefts, surrounded by a spindle cell mesenchymal (stromal) component.