Primary malignant vascular bone tumors are unusual and include hemangioendothelioma, epitheloid hemangioendothelioma and angiosarcoma. Although few cases of primary bone angiosarcomas have been reported, those of femoral origin are even more infrequent. Such tumors diagnosis may be challenging due to their radiographic and histologic variety. We present a case of a 24-yearold woman with a subperiosteal diaphyseal angiosarcoma originating from the femoral bone and metastatic to the lung at the time of diagnosis. The clinical, histological and radiological features of this extremely rare lesion are presented.