[Supravoltage irradiation as a cause of maxillary fibrosarcoma]

Therapeutic doses of supravoltage radiation are not commonly thought to be carcinogenic and post-irradiation fibrosarcoma of the head and neck regions is rare. We present a 43-year-old man with post-irradiation fibrosarcoma of the maxilla, who had had supravoltage radiation 12 years before for nasopharyngeal carcinoma.