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诱导化疗对局部晚期鼻咽癌调强计划的影响 被引量:5

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摘要 目的:探讨多西他赛联合奈达铂(DN)方案诱导化疗对局部晚期鼻咽癌肿瘤体积、调强计划靶区剂量及周围危及器官剂量的影响。方法:6个治疗中心共30例局部晚期鼻咽癌患者入组。先行2个疗程DN方案诱导化疗,方案为多西他赛65mg/m2,第一天,静脉滴注,奈达铂80mg/m2,第一天,静脉滴注,每3周为1个疗程。诱导化疗前及第2次诱导化疗后第2周分别行CT模拟扫描,并制定诱导化疗前后调强适形放射治疗(IMRT)计划。处方剂量:PTVnx 68~72Gy,PTVnd 66~70Gy,PTVl60~64Gy,PTV250~54Gy,5次/周,共30次。结果:诱导化疗后GTVnx体积缩小28.67%,与诱导化疗前比较差异有统计学意义(t=9.225,P=0.000);GTVnd体积缩小47.47%,与诱导化疗前比较差异有统计学意义(t=6.663,P=0.000)。诱导化疗前后PTVnx处方剂量所覆盖的体积提高了1.77%[(1.77±0.47)%];脑干、脊髓、视神经及视交叉的平均剂量下降0.4~0.79Gy;左侧腮腺的平均剂量降低1.27Gy,右侧降低0.92Gy;左侧颞叶的平均剂量降低1.61Gy,右侧降低1.83Gy。诱导化疗后Ⅲ~Ⅳ级中性粒细胞减少发生率为6.6%;30%(9/30)的患者出现Ⅰ~Ⅱ级胃肠道反应。结论:DN方案诱导化疗后肿瘤缩小明显,可有效的提高IMRT计划中肿瘤靶区的剂量覆盖,并降低危及器官的照射剂量,患者可耐受。
出处 《广西医科大学学报》 CAS 2012年第4期555-557,共3页 Journal of Guangxi Medical University
基金 广西医疗卫生重点科研课题(No.重2011074)
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