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Outcomes of patients with spinal metastases from renal cell carcinoma treated with conventionally-fractionated external beam radiation therapy.

肾癌脊柱转移患者接受常规分割外照射治疗的结局。

  • 影响因子:1.95
  • DOI:10.1097/MD.0000000000019838
  • 作者列表:"Lee CC","Tey JCS","Cheo T","Lee CH","Wong A","Kumar N","Vellayappan B
  • 发表时间:2020-04-01
Abstract

:Renal cell carcinoma (RCC) has been traditionally thought to be radioresistant. This retrospective cohort study aims to assess the outcomes of patients with spinal metastases from RCC treated with conventionally-fractionated external beam radiation therapy (cEBRT) in our institution.Patients diagnosed with histologically or radiologically-proven RCC who received palliative cEBRT to spinal metastases, using 3-dimensional conformal technique between 2009 and 2018 were reviewed. Local progression-free survival (PFS), overall survival (OS) and common terminology criteria for adverse events version 4.0-graded toxicity were assessed. Univariable and multivariable Cox proportional hazards regression analyses were performed to evaluate for predictors associated with survivals.Thirty-five eligible patients with forty spinal segments were identified, with a median follow-up of 7 months (range, 0-47). The median equivalent dose in 2 Gy fractions (EQD2) was 32.5 Gy 10 (range, 12-39). Thirty-seven percent of patients underwent surgical intervention. At the time of last follow-up, all but 1 patient had died. Seven patients developed local progression, with the median time to local progression of 10.2 months. The median local PFS and OS were 3.3 and 4.8 months. There was no grade 3 or higher toxicity. A higher radiation dose (equivalent dose to 2 Gy fraction <32.5 Gy 10 vs ≥32.5Gy 10) (hazard ratio [HR], 0.47; 95% confidence interval [CI], 0.17-3.18; P-value (P) = .68) and spinal surgery (HR, 2.35; 95% CI, 0.53-10.29; P = .26) were not significantly associated with local PFS on univariable analysis. Multivariable analysis showed that higher Tokuhashi score (HR, 0.41; 95% CI, 0.19-0.88; P = .02), lower number of spinal segments irradiated (HR, 1.18; 95% CI, 1.01-1.37; P = .04) and use of targeted therapy (HR, 0.41; 95% CI, 0.18-0.96; P = .04) were independent predictors for improved OS.For an unselected group of patients with RCC, there is no significant association between higher radiation dose and improved local control following cEBRT. This may be due to their short survivals. With the use of more effective systemic therapy, including targeted therapy and immunotherapy, survival will likely be prolonged. A tailored-approach is needed to identify patients with good prognosis who may still benefit from aggressive local treatments.

摘要

: 肾细胞癌 (RCC) 传统上被认为是放射抗拒的。本回顾性队列研究旨在评估本机构接受常规分割外照射放射治疗 (cEBRT) 的RCC脊柱转移患者的结局。回顾了 2009 年至 2018 年间使用三维适形技术接受姑息性cEBRT治疗脊柱转移瘤的经组织学或放射学证实的RCC患者。评估了局部无进展生存期 (PFS) 、总生存期 (OS) 和不良事件通用术语标准 4.0 版分级毒性。进行单变量和多变量Cox比例风险回归分析,评价与生存相关的预测因子。确定了 35 例符合条件的 40 个脊柱节段的患者,中位随访时间为 7 个月 (范围,0-47)。2 Gy级分 (EQD2) 的中位等效剂量为 32.5 Gy 10 (范围 12-39)。37% 的患者接受了手术干预。末次随访时,除 1 例患者外,其余患者均已死亡。7 例患者出现局部进展,至局部进展的中位时间为 10.2 个月。中位局部PFS和OS分别为 3.3 和 4.8 个月。没有 3 级或更高的毒性。较高的辐射剂量 (等效剂量至 2 Gy分数 <32.5 Gy 10 vs ≥ 32。5Gy 10) (风险比 [HR],0.47; 95% 置信区间 [CI],0.17-3.18; P值 (P) = .68) 和脊柱手术 (HR,2.35; 95% CI,0.53-10.29; P =.26)在单变量分析中与局部PFS无显著相关性。多变量分析显示,Tokuhashi评分较高 (HR,0.41; 95% CI,0.19-0.88; P =.02),照射的脊柱节段数较低 (HR,1.18; 95% CI,1.01-1.37; P =.04) 和靶向治疗的使用 (HR,0.41; 95% CI,0.18-0.96; P =.04)是OS改善的独立预测因素。对于一组未经选择的RCC患者,较高的辐射剂量与cEBRT后局部控制改善之间无显著相关性。这可能是由于他们的生存期短。随着更有效的全身治疗,包括靶向治疗和免疫治疗的使用,生存期将可能延长。需要一种量身定制的方法来确定预后良好的患者,他们可能仍然受益于积极的局部治疗。

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骨肿瘤方向

骨肿瘤是发生于骨骼或其附属组织的肿瘤。有良性,恶性之分,良性骨肿瘤易根治,预后良好,恶性骨肿瘤发展迅速,预后不佳,死亡率高。

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