Modifiable risk factors for acute skin toxicity in adjuvant breast radiotherapy: Dosimetric analysis and review of the literature

被引:11
作者
Keenan, Lorna G. [1 ]
Lavan, Naomi [1 ]
Dunne, Mary [1 ]
McArdle, Orla [1 ]
机构
[1] St Lukes Hosp, St Lukes Radiat Oncol Network, Dublin 6, Ireland
关键词
Acute skin toxicity; Dosimetric parameter; Breast radiotherapy; RADIATION-THERAPY; CANCER; TRIAL;
D O I
10.1016/j.meddos.2018.01.004
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Acute skin toxicity in adjuvant breast radiation can be reduced with modern radiotherapy (RT) techniques. However, having reviewed the literature, we found no dosimetric constraint for acute skin toxicity that would be applicable to modern RT planning. This study aimed to identify dosimetric factors that are associated with higher rates of acute skin toxicity. A retrospective review was carried out including women who received adjuvant forward-planned intensity-modulated radiotherapy (IMRT) after breast-conserving surgery. Acute skin toxicity grade was prospectively recorded. A total of 131 patients were analyzed. On multivariate analysis, the V105% > 30 cc (p = 0.013) and the use of conventional fractionation (CF) (p = 0.001) were statistically significant for acute skin toxicity. On literature review, current quantitative dosimetric parameters that have shown statistical significance include a V107%> 3 cc in hypofractionation (HF), V107%> 9 cc in CF, treated volume 110%> 5.13%, and V107%> 28.6%. There is little evidence on the predictive value of clinically applicable dosimetric factors in acute skin toxicity. Given the recent improvements in RT planning, we would consider a V107% or a V110% too high a dosimetric value to be useful for the majority of patients. We have shown that a V105% of greater than 30 cc is significantly associated with acute skin toxicity, controlling for other variables. We suggest that this is currently the most useful modifiable parameter available to reduce skin toxicity and is applicable to modern RT planning. We also suggest that consideration be given to hypofractionated schedules to further reduce acute skin toxicity. (C) 2019 Published by Elsevier Inc. on behalf of American Association of Medical Dosimetrists.
引用
收藏
页码:51 / 55
页数:5
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