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Space-making particle therapy for sarcomas derived from the abdominopelvic region
Radiotherapy and Oncology ( IF 5.7 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.radonc.2020.02.021
Shohei Komatsu 1 , Yusuke Demizu 2 , Nor Shazrina Sulaiman 3 , Kazuki Terashima 3 , Masaki Suga 4 , Masahiro Kido 1 , Hirochika Toyama 1 , Sunao Tokumaru 3 , Tomoaki Okimoto 3 , Ryohei Sasaki 5 , Takumi Fukumoto 1
Affiliation  

BACKGROUND The primary definitive treatment for abdominopelvic sarcomas (APSs) is resection, although incomplete resection has a negative prognostic impact. Although the effectiveness of particle therapy (PT) as a treatment for APS has already been demonstrated, its application for tumors adjacent to the gastrointestinal tract is frequently restricted, due to extremely low tolerance. Space-making PT, consisting of surgical spacer placement and subsequent PT, has been developed to overcome this limitation. MATERIALS AND METHODS Between June 2006 and June 2018, a total of 75 patients with 12 types of APS underwent space-making PT. RESULTS The 3-year local control rate of all patients was 90.3%. Fourteen surgery-related complications were observed in 12 patients (16%), and complications of Grade 3b or higher were observed in 3 patients. Ninety-five PT-related complications were seen in 66 patients (88.0%), and 13 patients (17.3%) had complications of Grade 3 or higher. The median V95% (volume irradiated with 95% of the treatment planning dose) of the gross tumor volume and clinical target volume were 99.9% and 99.5%, respectively. The median D95% (dose intensity covering 95% of the target volume) of the gross tumor volume/planned dose and clinical target volume/planned dose were 99.4%, and 99.1%, respectively. CONCLUSION The feasibility and effectiveness of space-making PT have been demonstrated via dosimetric evaluation, and our results indicate that this new strategy may potentially provide an effective and innovative treatment option for advanced APS.

中文翻译:

源自腹盆腔区域的肉瘤的空间制造粒子治疗

背景 腹盆腔肉瘤 (APS) 的主要根治性治疗方法是切除术,但不完全切除术对预后有负面影响。尽管粒子疗法 (PT) 作为 APS 治疗方法的有效性已经得到证明,但由于耐受性极低,它在胃肠道附近肿瘤的应用经常受到限制。空间制造 PT 由手术间隔器放置和随后的 PT 组成,旨在克服这一限制。材料与方法 2006 年 6 月至 2018 年 6 月,共 75 例 12 种 APS 患者接受了空间制造 PT。结果所有患者3年局部控制率为90.3%。12 名患者(16%)观察到 14 种手术相关并发症,3 名患者观察到 3b 级或更高级别的并发症。66 名患者 (88.0%) 出现 95 种 PT 相关并发症,13 名患者 (17.3%) 出现 3 级或更高级别的并发症。总肿瘤体积和临床靶体积的中值 V95%(用 95% 的治疗计划剂量照射的体积)分别为 99.9% 和 99.5%。总肿瘤体积/计划剂量和临床目标体积/计划剂量的中位 D95%(剂量强度覆盖目标体积的 95%)分别为 99.4% 和 99.1%。结论 空间制造 PT 的可行性和有效性已通过剂量学评估得到证明,我们的结果表明,这种新策略可能为晚期 APS 提供有效和创新的治疗选择。总肿瘤体积和临床靶体积的中值 V95%(用 95% 的治疗计划剂量照射的体积)分别为 99.9% 和 99.5%。总肿瘤体积/计划剂量和临床目标体积/计划剂量的中位 D95%(剂量强度覆盖目标体积的 95%)分别为 99.4% 和 99.1%。结论 空间制造 PT 的可行性和有效性已通过剂量学评估得到证明,我们的结果表明,这种新策略可能为晚期 APS 提供有效和创新的治疗选择。总肿瘤体积和临床靶体积的中值 V95%(用 95% 的治疗计划剂量照射的体积)分别为 99.9% 和 99.5%。总肿瘤体积/计划剂量和临床目标体积/计划剂量的中位 D95%(剂量强度覆盖目标体积的 95%)分别为 99.4% 和 99.1%。结论 空间制造 PT 的可行性和有效性已通过剂量学评估得到证明,我们的结果表明,这种新策略可能为晚期 APS 提供有效和创新的治疗选择。总肿瘤体积/计划剂量和临床目标体积/计划剂量的中位 D95%(剂量强度覆盖目标体积的 95%)分别为 99.4% 和 99.1%。结论 空间制造 PT 的可行性和有效性已通过剂量学评估得到证明,我们的结果表明,这种新策略可能为晚期 APS 提供有效和创新的治疗选择。总肿瘤体积/计划剂量和临床目标体积/计划剂量的中位 D95%(剂量强度覆盖目标体积的 95%)分别为 99.4% 和 99.1%。结论 空间制造 PT 的可行性和有效性已通过剂量学评估得到证明,我们的结果表明,这种新策略可能为晚期 APS 提供有效和创新的治疗选择。
更新日期:2020-05-01
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