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一个阶段试验的救援立体性身体辐射疗法为放射性复发性前列腺癌后手臂治疗后的治疗
Krishnan R Patel1, Nicholas R Rydzewski1, Erica Schott1
1Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
概括
在手臂治疗后复发前列腺癌的救援立体辐射疗法 (SBRT) 发现42.5 Gy分为5个分量是最大耐受剂量,达到86%的2年无进展生存率,可控毒性.
科学领域:
- 辐射瘤学 辐射瘤学
- 尿道瘤学 尿道瘤学
- 临床试验 临床试验
背景情况:
- 布拉基疗法后前列腺癌复发对挽救治疗提出了挑战.
- 立体性身体辐射疗法 (SBRT) 是局部性前列腺癌复发的新兴选择.
研究的目的:
- 为了确定救援SBRT的最大耐受剂量 (MTD),用于布拉基疗法后局部前列腺癌复发的患者.
- 为了评估生物化学控制和成像反应在救援后SBRT.
主要方法:
- 第1阶段,3+3试验设计评估了3种剂量水平 (40,42.5,45 Gy分为5个分数).
- 强度调节辐射疗法用于准瘤总体体积和前列腺.
- 剂量升级根据预定义的剂量限制毒性 (DLT) 根据常用术语对不良事件标准v5.0.0.停止.
主要成果:
- 9名患者接受了救援SBRT,随访时间中位数为22个月.
- 没有观察到DLT (级别≥3GU/GI毒性),导致基于修改的停止.
- 鉴定MTD为42.5 Gy,分为5个分量,这是由于其优异的生物化学控制和高发病率的晚期2级生殖尿道 (GU) 毒性.
- 一年和两年的无生物化学进展生存率分别为100%和86%.
结论:
- 在这种设置下,救援SBRT的MTD为42.5 Gy分为5个分数.
- 这一剂量实现了86%的2年无生物化学进展生存率.
- 晚期2级GU毒性是观察到的最常见的显著毒性.
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