Primary angiosarcoma of breast: a case report.

Primary breast sarcomas are rare entities. These malignant tumors originate from mesenchymal glandular breast tissue and account for <1 % of all breast cancer cases. Angiosarcomas are rare malignant tumors that arise from endothelial cells lining vascular channels. Most angiosarcomas are secondary to radiotherapy treatments for breast cancer or to an arm lymphoedema subsequent to a modified radical mastectomy. Primary angiosarcomas are rare and account for 0.04 % of all malignant breast tumors.