NO期鼻咽癌颈淋巴结区域预防照射方式的探讨

背景与目的:鼻咽癌一侧或双侧颈部淋巴结阴性者颈部的区域预防照射范围及剂量尚无定论。本研究通过回顾性分析,探讨鼻咽癌影像学诊断N0期患者颈部预防野照射方式,并分析颈部淋巴结复发因素及预后因素。方法:收集2002年1月至2004年12月205例N0期鼻咽癌患者资料,治疗前均行鼻咽部和颈部影像学检查。采用直线加速器产生的6～8MV高能X线,以面颈联合野为主的放疗技术,鼻咽原发灶照射剂量为60～80Gy,颈部剂量为46～64Gy。常规分割、连续照射。按颈部预防照射范围将患者分为两组,半颈预防组和全颈预防组。60例进行了化疗。随访时间3～68个月,中位随访时间44个月。累积生存率采用Kaplan-Meier计算,对生存率的差异采用log-rank进行显著性检验,多因素分析采用Cox风险比例模型前进法。结果:205例N0期鼻咽癌患者,3年总生存率及无瘤生存率分别为92.9%、91.9%。半颈、全颈预防组淋巴结复发率分别为2.27%、0,T1、T2、T3、T4期患者的颈部复发率分别为0、3.08%、0、0,鼻咽无复发时、复发时的颈部淋巴结复发率分别为1.03%、0,各组淋巴结复发率比较差异均无统计学意义(P>0.05)。半...

Prophylactic irradiation of cervical lymph nodes for Stage-N0 nasopharyngeal carcinoma

Background and Objective:It is controversial for the irradiation level and dose of the regional prevention for nasopharyngeal cancer (NPC) with one or both cervical lymph node-negative neck.This study was to analyze the prophylactic irradiation of cervical lymph nodes for Stage-N0 NPC patients.Methods:From January 2002 to December 2004,205 patients with NPC,whose negative cervical lymph nodes were diagnosed by imageology,were analyzed retrospectively.CT scan or MRI before treatment was performed to every pa...