Reduced-dose vs Standard-dose Irradiation for Low-risk Clinical Target Volume in Nasopharyngeal Carcinoma.

Inclusion Criteria

• •Newly diagnosed, untreated, non-distant metastatic, and non-keratinizing NPC; aged between 18 and 70 years; Eastern Cooperative Oncology Group performance score of 0-1; adequate hematologic function (neutrophil count ≥ 1.5 × 10\^9/L, platelet count ≥100×109/L, and hemoglobin≥ 90 g/L); adequate renal function (creatinine ≤ 1.5 upper limit of normal \[ULN\]) or calculated creatinine clearance (CrCl) ≥ 60 mL/min (Cockcroft-Gault formula); and adequate hepatic function (serum bilirubin ≤ 2.0×ULN, and alanine aminotransferase and aspartate aminotransferase ≤ 2.5×ULN).