Heterologous osseous differentiation in Malignant Phyllodes tumour – A rare case report

Breast sarcomas are rare neoplasms accounting for less than 1% of breast malignancy. Phyllodes tumors have biphasic histological features with both epithelial and stromal component. Careful characterization of the stromal component is critical since it is the pathologic features of the stromal cells that determine its malignant potential. We reported a case of 57 years old female with right breast mass who underwent wide excision and on histological examination a diagnosis of malignant phyllodes tumour with heterogonous osseous differentiation was made. The rarity of the lesion was considered for reporting and on follow up the patient was free of metastasis.