Severe late esophagus toxicity in NSCLC patients treated with IMRT and concurrent chemotherapy

被引:50
作者
Chen, Chun [1 ]
Uyterlinde, Wilma [2 ]
Sonke, Jan-Jakob [1 ]
de Bois, Josien [1 ]
van den Heuvel, Michel [2 ]
Belderbos, Jose [1 ]
机构
[1] Netherlands Canc Inst, Dept Radiat Oncol, NL-1066 CX Amsterdam, Netherlands
[2] Netherlands Canc Inst, Dept Thorac Oncol, NL-1066 CX Amsterdam, Netherlands
关键词
Late esophagus toxicity; Acute esophagus toxicity; Non small cell lung cancer (NSCLC); Concurrent chemoradiation; IMRT; NTCP; CELL LUNG-CANCER; NORMAL TISSUE; RADIOTHERAPY; TRIAL; PREDICTORS;
D O I
10.1016/j.radonc.2013.08.017
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Background and purpose: We reported the incidence of severe late esophagus toxicity (LET) in locally advanced NSCLC patients treated with intensity-modulated radiation therapy (IMRT) and concurrent chemotherapy. Acute esophagus toxicity (AET) and the dose to the esophagus were analyzed for their associations with severe LET. Material and methods: Two hundred and thirty-one patients treated from 2008 to 2011 with hypofractionated IMRT (66 Gy/24 fx) and concurrent daily low dose cisplatin were included. The association between AET and severe LET (grade >= 3 RTOG/EORTC) was tested through Cox-proportional-hazards model. Equivalent uniform dose (EUD) to the esophagus and the volume percentage receiving more than x Gy (V-x) were applied by Lyman-Kutcher-Burman (LKB) model. Results: A total of 171 patients were eligible for this study. Severe LET was observed in 6% patients. Both the maximum grade and the recovery rate of AET were significantly associated with severe LET. In the EUDn-LKB model, the fitted values and 95% confidence intervals (CIs) were TD50 = 76.1 Gy (73.2-78.6), m = 0.03 (0.02-0.06) and n = 0.03 (0-0.08). In the V-x-LKB model, the fitted values and 95% CIs were Tx(50) = 23.5% (16.4-46.6), m = 0.44 (0.32-0.60) and x = 76.7 Gy (74.7-77.5). Conclusions: Severe AET, EUD (n = 0.03) and V76.7 to the esophagus were significantly associated with severe LET. An independent validation study is required. (C) 2013 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:337 / 341
页数:5
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