胸段局部晚期食管癌术后预防性照射的剂量学研究(1)
[摘要] 目的 探讨胸段局部晚期食管鳞癌术后扩大野淋巴引流区预防照射的剂量学可行性。方法 回顾性分析该院2013年5月—2016年4月收治的23例胸段局部晚期食管鳞癌患者临床资料。放疗处方剂量为95% PTV 50/50.4 Gy,1.8~2.0 Gy/次,5次/周。结果 分析入组患者资料,胸部放疗常规危及器官剂量学参数:双肺V20为19.44%(12.12%~25.88%)、V30为7.18%(3.64%~11.87%);胸胃V40为5.01%(0.63%~27.53%);心脏V30为37.35%(7.4%~61.88%)、V40为13.02%(1.44%~37.53%)。全组患者中位PFS为30个月;1、3年OS分别为87.00%、49.00%。 结论 胸段局部晚期食管癌术后淋巴引流区预防照射是安全可行的。
[关键词] 食管肿瘤;放射疗法;调强;术后预防性照射;预后
[中图分类号] R73 [文献标识码] A [文章编号] 1674-0742(2017)10(b)-0088-03
[Abstract] Objective This paper tries to explore the dose feasibility of preventing radiation in the postoperative dilatation of the esophageal squamous cell carcinoma of the thoracic region. Methods The clinical data of 23 patients with local advanced esophageal squamous carcinoma treated in this hospital from May 2013 to April 2016 were retrospectively analyzed. The prescribed dose was 95% PTV 50/50. 4 Gy, 1.8 to 2.0 Gy/time, 5 times/week. Results Analyzed the data of patients enrolled in the group, and the dosimetry parameters of organs at risk for thoracic radiotherapy were as follows: the median bilateral lung V20 was 19.44%(12.12% to 25.88%), V30 was 7.18% (3.64% to 11.87%). The median stomach V40 was 5.01% (0.63% to 27.53%). The median heart V30 was 37.35% (7.4% to 61.88%) and V40 was and 13.02% (1.44% to 37.53%) respectively. The median PFS was 30 months, and the OS in one year and three years were 87.00% and 49.00% respectively. Conclusion Postoperative prophylactic radiotherapy for thoracic local advanced esophageal cancer were safe and feasible.
[Key words] Esophageal neoplasms; Radiotherapy; Intensity-modulated; Postoperative prophylactic radiotherapy; Prognosis
目前,胸段局部晚期食管癌主要的手术方式为食管肿瘤切除加两野淋巴结清扫。然而单纯手术切除后5年OS率仅20%~25%,术后区域淋巴结复发转移是主要的失败因素之一。食管肿瘤切除加三野淋巴结清扫可提高部分胸段食管癌患者总体预后。因此,回顾性分析该院自2013年5月—2016年4月收治的23例胸段局部晚期食管癌患者资料,均接受预防性三野淋巴引流区照射,现报道如下。
1 資料与方法
1.1 一般资料
方便选取符合入组患者共23例,KPS评分均≥70分。男20例(占87%),中位年龄60岁(48~72岁)。术后化疗者14例(占61%),手术至放疗中位间隔时间4个月(1.1~6.7个月)。见表1。
1.2 入组标准
①胸段食管癌开胸或胸腔镜两野淋巴结清扫R0根治术;②术后病理诊断为鳞癌且分期为局部晚期;③ KPS评分≥70;④无肝肾功能、血液学异常;⑤无心、肝、肾等重要器官病变。
1.3 放射治疗
患者取仰卧位热塑体罩固定后行增强CT扫描。图像上传至RayStation计划系统行靶区勾画。临床靶区(clinical target volume, CTV)勾画原则为:①胸上段:环状软骨下缘开始,锁骨上下区、瘤床、纵膈1~5区、7区及胃左淋巴引流区;②胸中段及下段:锁骨上下区、瘤床、纵膈1~5区、7区、胃左及 腹腔干淋巴引流区。计划靶区(planning target volume, PTV)在CTV的基础上外扩0.5 cm,根据解剖调整其边界。危及器官(OAR)包括咽喉、双肺、胸胃、食管、脊髓、心脏。采用6MV-X线三位适形调强放射治疗(IMRT)。处方剂量为95%PTV 50/50.4 Gy,1.8~2.0 Gy/次,5次/周。
1.4 疗效评价标准
该研究入组患者均为R0术后。放疗后1~2年内每3~6个月随访,3年后每6个月随访。该研究主要终点为安全性。次要终点为总生存期(OS)和无进展生存期(PFS)。各危及器官不良反应评价根据NCI 3.0标准。, 百拇医药(刘春雷 白志军)
[关键词] 食管肿瘤;放射疗法;调强;术后预防性照射;预后
[中图分类号] R73 [文献标识码] A [文章编号] 1674-0742(2017)10(b)-0088-03
[Abstract] Objective This paper tries to explore the dose feasibility of preventing radiation in the postoperative dilatation of the esophageal squamous cell carcinoma of the thoracic region. Methods The clinical data of 23 patients with local advanced esophageal squamous carcinoma treated in this hospital from May 2013 to April 2016 were retrospectively analyzed. The prescribed dose was 95% PTV 50/50. 4 Gy, 1.8 to 2.0 Gy/time, 5 times/week. Results Analyzed the data of patients enrolled in the group, and the dosimetry parameters of organs at risk for thoracic radiotherapy were as follows: the median bilateral lung V20 was 19.44%(12.12% to 25.88%), V30 was 7.18% (3.64% to 11.87%). The median stomach V40 was 5.01% (0.63% to 27.53%). The median heart V30 was 37.35% (7.4% to 61.88%) and V40 was and 13.02% (1.44% to 37.53%) respectively. The median PFS was 30 months, and the OS in one year and three years were 87.00% and 49.00% respectively. Conclusion Postoperative prophylactic radiotherapy for thoracic local advanced esophageal cancer were safe and feasible.
[Key words] Esophageal neoplasms; Radiotherapy; Intensity-modulated; Postoperative prophylactic radiotherapy; Prognosis
目前,胸段局部晚期食管癌主要的手术方式为食管肿瘤切除加两野淋巴结清扫。然而单纯手术切除后5年OS率仅20%~25%,术后区域淋巴结复发转移是主要的失败因素之一。食管肿瘤切除加三野淋巴结清扫可提高部分胸段食管癌患者总体预后。因此,回顾性分析该院自2013年5月—2016年4月收治的23例胸段局部晚期食管癌患者资料,均接受预防性三野淋巴引流区照射,现报道如下。
1 資料与方法
1.1 一般资料
方便选取符合入组患者共23例,KPS评分均≥70分。男20例(占87%),中位年龄60岁(48~72岁)。术后化疗者14例(占61%),手术至放疗中位间隔时间4个月(1.1~6.7个月)。见表1。
1.2 入组标准
①胸段食管癌开胸或胸腔镜两野淋巴结清扫R0根治术;②术后病理诊断为鳞癌且分期为局部晚期;③ KPS评分≥70;④无肝肾功能、血液学异常;⑤无心、肝、肾等重要器官病变。
1.3 放射治疗
患者取仰卧位热塑体罩固定后行增强CT扫描。图像上传至RayStation计划系统行靶区勾画。临床靶区(clinical target volume, CTV)勾画原则为:①胸上段:环状软骨下缘开始,锁骨上下区、瘤床、纵膈1~5区、7区及胃左淋巴引流区;②胸中段及下段:锁骨上下区、瘤床、纵膈1~5区、7区、胃左及 腹腔干淋巴引流区。计划靶区(planning target volume, PTV)在CTV的基础上外扩0.5 cm,根据解剖调整其边界。危及器官(OAR)包括咽喉、双肺、胸胃、食管、脊髓、心脏。采用6MV-X线三位适形调强放射治疗(IMRT)。处方剂量为95%PTV 50/50.4 Gy,1.8~2.0 Gy/次,5次/周。
1.4 疗效评价标准
该研究入组患者均为R0术后。放疗后1~2年内每3~6个月随访,3年后每6个月随访。该研究主要终点为安全性。次要终点为总生存期(OS)和无进展生存期(PFS)。各危及器官不良反应评价根据NCI 3.0标准。, 百拇医药(刘春雷 白志军)