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J Clin Oncol:局部晚期非小细胞肺癌:强度调控放疗vs三维适形体外放疗

2017-04-13 选题审校:韩茹 编辑:吴星 环球医学编译

专家点评:IMRT被定义为在放疗过程中,改变能量频率和随后的放疗剂量。

肺癌是世界范围内最常见的恶性肿瘤之一,非小细胞肺癌约占全部肺癌的80%。2017年1月,发表在《J Clin Oncol.》的一项研究比较了三维适形体外放疗和强度调控放疗治疗局部晚期非小细胞肺癌的结局。

目的:尽管强度调控放疗(IMRT)越来越多地用于局部晚期非小细胞肺癌(NSCLC),但IMRT与三维适形体外放疗(3D-CRT)并未得到前瞻性比较。该研究在一项大型前瞻性临床试验中比较了3D-CRT和IMRT治疗局部晚期NSCLC的结局。

患者和方法:对NRG肿瘤临床试验RTOG 0617进行二次分析,比较IMRT与3D-CRT。试验中,患者接受卡铂和紫杉醇联合或不联合西妥昔单抗,以及60 Gy vs 40 Gy辐射剂量的同步放化疗。比较包括2年总生存期(OS)、无进展生存期、局部损伤、远端转移,以及不良事件常用术语标准(第3版)≥3级的毒性。

结果:中位随访为21.3个月。在482例患者中,53%接受3D-CRT治疗,47%接受IMRT治疗。IMRT组放疗剂量体积较大((中位,427 vs 486 mL;P = 0.005);放疗剂量体积/肺容积比率较高(中位,0.13 vs 0.15;P = 0.013),IIIB期疾病更多(30.3% vs 38.6%,P = 0.056)。IMRT组与3D-CRT组的2年OS、无进展生存期、局部损伤和远端无转移生存期无差异。IMRT与≥3级肺炎更少(7.9% vs 3.5%,P = 0.039)、校正分析中风险降低(风险比,0.41;95% CI,0.171~0.986;P = 0.046)相关。IMRT也使心脏药量降低(P<0.05),心脏40 Gy辐射剂量(V40)与校正分析中OS显着相关(P<0.05)。肺V5与≥3级的毒性不相关,但在多变量分析中,肺V20与≥3级肺炎风险增加相关(P = 0.026)。

结论:在NRG 肿瘤临床试验RTOG 0617中,IMRT与重症肺炎和心脏药量比例降低相关,该结果支持IMRT常规用于局部晚期NSCLC。


(专家点评:IMRT被定义为在放疗过程中,改变能量频率和随后的放疗剂量。)

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    2017-07-22 minlingfeng
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    2017-04-18 1e10c84am36(暂无匿称)

    文章不错,拜读了

    0

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    2017-04-16 ylzr123

    感谢小编为我们精心准备了如此精辟的精神大餐,小编辛苦了!

    0

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    2017-04-15 chg122

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