Phase II study of consolidative intensity-modulated radiation therapy following first-line palliative systemic chemotherapy for de novo previously untreated metastatic (M1) nasopharyngeal carcinoma.

6524Background: The prognosis of de novo previously untreated metastatic (M1) nasopharyngeal carcinoma (NPC) at diagnosis is poor, and the role of consolidative intensity-modulated radiation therap...