[Primary osteogenic sarcoma of the breast. Clinical contribution]

A case of primary osteogenic sarcoma of the breast is reported. All its clinical, radiological, gross and histological characteristics are analyzed, nevertheless the diagnosis is difficult. The authors dwell upon the utility of fine-needle aspiration and upon the importance of histologic and immunohistochemical studies. After emphasizing the difficulty both in an adequate local control and of metastasis, the authors point to the right therapeutic ways, still debated for the rarity of the tumor, which precludes every prospective trial.