The purpose of this study is to compare cisplatin-based with carboplatin-based chemoradiotherapy in patients with locoregionally advanced nasopharyngeal carcinoma (NPC), in order to confirm the value of carboplatin-based chemoradiotherapy in NPC patients.

Patients presented with non-keratinizing NPC and stage T3-4NxM0/TxN2-3M0 are randomly assigned to receive cisplatin-based (control arm) with carboplatin-based (investigational arm) chemoradiotherapy. Patients in the investigational arm receive docetaxel (75mg/m2 on day 1), carboplatin (AUC 4 on day 1) every three weeks for two cycles before the radiotherapy, and then receive radical radiotherapy and carboplatin (AUC 5 on day 1) every three weeks for three cycles during radiotherapy. Patients in the control arm receive docetaxel (75mg/m2 on day 1), cisplatin (75mg/m2 on day 1) every three weeks for two cycles before the radiotherapy, and then receive radical radiotherapy and cisplatin (100mg/m2 on day 1) every three weeks for three cycles during radiotherapy. Patients are stratified according to stage. The primary end point is overall survival (OS). Secondary end points include failure-free survival (FFS), distant failure-free survival (D-FFS), locoregional failure-free survival (LR-FFS), initial response rates after treatments and toxic effects. All efficacy analyses are conducted in the intention-to-treat population; the safety population include only patients who receive their randomly assigned treatment.

Inclusion Criteria:

• Patients with newly histologically confirmed non-keratinizing (according to World Health Organization (WHO) histologically type).
• Tumor staged as T3-4Nx/TxN2-3 (according to the 8th American Joint Commission on Cancer edition).
• No evidence of distant metastasis (M0).
• Satisfactory performance status: Karnofsky scale (KPS) > 70.
• Adequate marrow: leucocyte count ≥4000/μL, hemoglobin ≥90g/L and platelet count ≥100000/μL.
• Normal liver function test: Alanine Aminotransferase (ALT)、Aspartate Aminotransferase (AST) <1.5×upper limit of normal (ULN) concomitant with alkaline phosphatase (ALP) ≤2.5×ULN, and bilirubin ≤ULN.
• Adequate renal function: creatinine clearance ≥60 ml/min.
• Patients must be informed of the investigational nature of this study and give written informed consent.

Exclusion Criteria:

• WHO Type keratinizing squamous cell carcinoma or basaloid squamous cell carcinoma.
• Age ≥65 years or <18 years.
• Treatment with palliative intent.
• Prior malignancy except adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer.
• Pregnancy or lactation.
• History of previous radiotherapy (except for non-melanomatous skin cancers outside intended RT treatment volume).
• Prior chemotherapy or surgery (except diagnostic) to primary tumor or nodes.
• Any severe intercurrent disease, which may bring unacceptable risk or affect the compliance of the trial, for example, unstable cardiac disease requiring treatment, renal disease, chronic hepatitis, diabetes with poor control (fasting plasma glucose >1.5×ULN), and emotional disturbance.