Malignant phyllodes tumor of the breast: A case report

Phyllodes tumors of the breast have biphasic histological features with both epithelial and stromal components. Careful characterization of the stromal compartment is critical since it is the pathologic features of the stromal cells that determine its malignant potential. We present a case report of a woman with an aggressive malignant phyllodes tumor with sarcomatous differentiation, who succumbed to metastatic disease within 8 months of initial presentation.