Objective: To study the influence of prolonged overall treatment time (OTT) and treatment interruptions (TI) on local control and survival in conventional continuous radiotherapy for nasopharyngeal carcinoma.

• 目的：探讨在常规连续放疗中，总治疗时间延长及疗程中断长短对鼻咽癌局部控制和远期生存的影响。