The authors report two cases of aortic angiosarcomas. These cases were
similar and characterized by a typical pejorative clinical course, wi
th peripheric emboli and many osteolytic metastasis. Immunohistochemic
al study was in favour of an endothelial origin, electronic microscopy
indicated a mixed tumor with myofibroblasts and poorly differentiated
endothelial cells. Differential diagnosis between angiosarcoma, leiom
yosarcoma and intima[ sarcoma are reviewed.