A Multicenter Randomized Controlled Clinical Study on the Treatment of T3N1M0 High Risk Nasopharyngeal Carcinoma With or Without Induction Chemotherapy Before Concurrent Radiotherapy and Chemotherapy

"Induction chemotherapy: TP( Docetaxel 75mg/m2, D1 and cisplatin 25 mg/m2, D1-3 every 3 weeks for 3 cycles) OR GP (Gemcitabine 1000mg/m2，D1,D8 and cisplatin 25 mg/m2, D1-3 every 3 weeks for 3 cycles）~Concurrent chemotherapy: DDP -- Cisplatin 25 mg/m2, D1-3 , every 3 weeks for 2 cycles during radiation."

Concurrent chemotherapy: DDP -- Cisplatin 25 mg/m2, D1-3 , every 3 weeks for 2 cycles during radiation.

Radical radiation: Intensity-modulated radiotherapy