To explore the 2 year PFS of patients with stageII-III nasopharyngeal carcinoma treated with induction chemotherapy followed by reduced-dose radiotherapy and cisplatin versus standard dose radiotherapy plus cisplatin concurrent chemotherapy. The enrolled patients will receive 2 cycles of cisplatin-based induction chemotherapy, if radiographic CR/PR and EBV DNA=0 after induction chemotherapy, the patients will be randomised assigned to received 60 Gy IMRT combined with 2 cycles of cisplatin concurrent chemotherapy or 70Gy IMRT combined with 3 cycles of cisplatin concurrent chemotherapy.
To study the 2-year PFS (progression-free survival) of patients with stage II-III nasopharyngeal carcinoma treated with induction chemotherapy followed by two different doses of intensity modulated radiation therapy plus concurrent cisplatin chemotherapy