Primary chondroblastic osteosarcoma of the breast. Case report and review of the literature.

Primary osteosarcomas of the breast are rare tumors. We report a 58-year-old woman who presented with a left breast lump suggestive of phyllodes tumor. A sectorectomy was performed and histological examination revealed a chondroblastic osteosarcoma, an unusual finding. Two months later she underwent a mastectomy. A review of the literature revealed the divergency of therapeutic options.