256例局部晚期NSCLC调强放疗后放射性肺损伤预测因素分析

被引:30
作者
孙帅
陈辛元
王静波
吉喆
毕楠
周宗玫
冯勤付
惠周光
梁军
肖泽芬
吕纪马
王小震
殷蔚伯
王绿化
机构
[1] 北京协和医学院中国医学科学院肿瘤医院放疗科
关键词
癌, 非小细胞肺/调强放射疗法; 癌, 非小细胞肺/化学疗法; 症状性放射性肺损伤;
D O I
暂无
中图分类号
R734.2 [肺肿瘤]; R730.55 [放射疗法];
学科分类号
100117 [系统生物医学]; 100234 [放射肿瘤学];
摘要
目的探讨局部晚期NSCLC受累野IMRT后放射性肺损伤发生率及寻找预测因素。方法 2007—2011年间在我院治疗的256例未手术、Ⅲ期NSCLC患者。放疗采用受累野IMRT。放疗剂量50~70 Gy (中位值60 Gy), 分割剂量2 Gy/次。109例(42.6%)接受同期化疗。采用NCI的CTCAE 3.0标准评估级别。以放疗结束后6个月内发生≥2级放射性肺损伤作为终点事件。采用Logistic回归模型对预测因素进行分析。结果所有患者中男215例(84%)、女41例(16%)。诊断时平均年龄59.2岁。43例(16.7%)发生≥2级放射性肺损伤。出现放射性肺损伤时间距放疗开始时间为20~169 d (中位数64 d)。单因素分析显示吸烟、肿瘤位置、双肺平均剂量、双肺V5—V20与≥2级放射性肺损伤发生可疑相关(P=0.108、0.106、0.030、0.049), 多因素分析结果显示双肺平均剂量和双肺V5—V20与≥2级放射性肺损伤发生密切相关(P=0.048)。结论局部晚期NSCLC受累野IMRT后双肺平均剂量和DVH中低剂量区体积可以初步预测症状性放射性肺损伤发生。
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