breast fibroepithelial neoplasm (MONDO_0021046, a Monarch Disease Ontology entry) is a benign or malignant biphasic neoplasm that arises from the breast parenchyma. It is characterized by the presence of an epithelial and a mesenchymal (stromal) component. The typical examples are fibroadenoma and phyllodes tumor. Also known as: breast fibroepithelial tumor, breast fibroepithelial tumour.