[Angiosarcoma in a mastectomy scar following irradiation].

A 74-year-old patient who had undergone radical mastectomy and postoperative radiotherapy for invasive ductal mammary carcinoma developed an angiosarcoma in the radiotherapy field without associated lymphedema. The latency time was 178 months after the first and 82 months after the second radiotherapy. The total radiation-dose was 54 Gy. Only a few such cases have so far been described. These tumors are often multifocal and their prognosis is poor. Better known are angiosarcomas appearing after radical mastectomy as a consequence of chronic lymphedema, which are known as Stewart-Treves-syndrome.