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术后立体放射性手术 (SRS) 与切除的大脑转移的低分化立体放射性疗法 (SRT) - - 一个单一中心分析
Lena Kretzschmar1, Hubert Gabrys2, Anja Joye2
1Department of Radiation Oncology, University Hospital Zurich, Zurich, Switzerland. Lena.Kretzschmar@usz.ch.
Clinical & experimental metastasis
|February 10, 2025
概括
立体射线手术 (SRS) 和低分离立体射线疗法 (SRT) 为较小的大脑转移的切除腔提供了优秀的局部控制. 对于较大的腔,规划目标体积会影响结果,这表明剂量升级的潜在好处.
科学领域:
- 神经外科 神经外科
- 辐射瘤学 辐射瘤学
- 在瘤学瘤学.
背景情况:
- 手术后的放射治疗增强了对大脑转移的局部控制 (LC).
- 与全脑放射疗法 (WBRT) 相比,立体射线手术 (SRS) 减少了认知副作用.
- 具有SRS的低最佳LC需要探索像低分离立体辐射疗法 (SRT) 这样的替代方案.
研究的目的:
- 为了比较SRS与SRT对切除的大脑转移的疗效和安全性.
- 根据切除腔的大小来评估局部控制 (LC) 和辐射死亡率 (RN).
- 在接受SRS或SRT治疗的患者中确定LC的预测因子.
主要方法:
- 在2018年2月至2023年6月期间,对161名患有185例切除脑转移的患者进行了回顾性分析.
- 患者根据切除腔体积 (SRS<10cc,SRT>10cc) 接受了SRS或SRT.
- 主要终点:LC;次要终点:RN. 数据被追溯分析.
主要成果:
- 12个月的LC为92.6%,12个月的RN发生率为9% (CTCAE v5 ≤2).
- SRS和SRT之间没有显著的LC差异,空腔小于10cc.
- 对于空腔>10cc,规划目标体积 (PTV) 是唯一重要的LC预测因素;分成和剂量没有显著影响.
结论:
- 无论是SRS还是SRT,都实现了优异的LC,在切除腔<10cc的RN率较低,有利于SRS,以提高患者舒适度和资源效率.
- 在较大的腔 (>10cc) 中,PTV体积是LC的关键因素.
- 剂量升级可能会改善较大的切除腔的结果.
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