1. Chemoradiotherapy by intensity-modulated radiation therapy with simultaneous integrated boost in locally advanced or oligometastatic non-small-cell lung cancer-a two center experience.
- Author
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Mantel, Frederick, Müller, Elena, Kleine, Philip, Zimmermann, Marcus, Exner, Florian, Richter, Anne, Weick, Stefan, Ströhle, Serge, Polat, Bülent, Höcht, Stefan, and Flentje, Michael
- Subjects
TREATMENT of lung tumors ,LUNG cancer treatment ,COMPUTERS in medicine ,LUNG cancer ,RESEARCH ,CARBOPLATIN ,ANTHROPOMETRY ,RESEARCH methodology ,LUNG tumors ,METASTASIS ,RETROSPECTIVE studies ,MEDICAL cooperation ,EVALUATION research ,RADIATION pneumonitis ,COMPARATIVE studies ,CISPLATIN ,BLOOD diseases ,RADIOTHERAPY ,COMPUTED tomography ,RADIATION injuries ,PACLITAXEL ,LONGITUDINAL method - Abstract
Purpose: Integrating moderate hypofractionation to the macroscopic tumor with elective nodal irradiation while sparing the organs at risk (OAR) in chemoradiotherapy of locally advanced non-small-cell lung cancer.Methods: From 2010-2018, treatment, patient and tumor characteristics of 138 patients from two radiation therapy centers were assessed. Chemoradiotherapy by intensity-modulated radiation therapy (IMRT) with a simultaneous integrated boost (SIB) to the primary tumor and macroscopic lymph node metastases was used.Results: A total of 124 (90%) patients received concurrent chemotherapy. 106 (76%) patients had UICC (Union for International Cancer Control) stage ≥IIIB and 21 (15%) patients had an oligometastatic disease (UICC stage IV). Median SIB and elective total dose was 61.6 and 50.4 Gy in 28 fractions, respectively. Furthermore, 64 patients (46%) had an additional sequential boost to the primary tumor after the SIB-IMRT main series: median 6.6 Gy in median 3 fractions. The median cumulative mean lung dose was 15.6 Gy (range 6.2-29.5 Gy). Median follow-up and radiological follow-up for all patients was 18.0 months (range 0.6-86.9) and 16.0 months (range 0.2-86.9), respectively. Actuarial local control rates at 1, 2 and 3 years were 80.4, 68.4 and 57.8%. Median overall survival and progression-free survival was 30.0 months (95% confidence interval [CI] 23.5-36.4) and 12.1 months (95% CI 8.2-16.0), respectively. Treatment-related toxicity was moderate. Radiation-induced pneumonitis grade 2 and grade 3 occurred in 13 (9.8%) and 3 (2.3%) patients.Conclusions: Chemoradiotherapy using SIB-IMRT showed promising local tumor control rates and acceptable toxicity in patients with locally advanced and in part oligometastatic lung cancer. The SIB concept, resulting in a relatively low mean lung dose, was associated with low numbers of clinically relevant pneumonitis. The overall survival appears promising in the presence of a majority of patients with UICC stage ≥IIIB disease. [ABSTRACT FROM AUTHOR]- Published
- 2021
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