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- W2337014711 abstract "Background Esophageal cancer is a highly lethal malignancy, and its treatment has undergone a major evolution over the past 15 years. The objective of this study was to report our experience on the efficacy of definite chemoradiotherapy with the intensity-modulated radiotherapy (IMRT) technique in treating locally advanced esophageal cancer. Methods From September 2004 to November 2011, 39 patients with biopsy-proven esophageal cancer, clinical stage T1-4N0-3M0 according to the American Joint Committee on Cancer 7th edition were enrolled. In these enrolled cases, either the tumor was unresectable or the patients refused surgery. All patients received a total radiation dose of 40–56 Gy in 20–28 fractions using IMRT planning. Five to seven radiation beam angles were designed according to the specific shape of the clinical target volume (CTV) and were delivered by a linear accelerator with photons of 6–10 MV energy. The gross tumor volume, CTV, planning target volume, and the organs at risk were outlined, and the homogeneity index (HI) and the conformity index (CI) were calculated. The treatment-related toxicities were also reviewed. Results The mean follow-up time was 22.4 months (range, 2.0–91.0 months). The 2- and 3-year overall survival rates were 30% and 28%, respectively. The most common Grade 3/4 toxicity was hematologic toxicity (43.6%). The IMRT plans showed high-dose homogeneity to the target, with a calculated HI of 0.9. The calculated CI of 0.8 also showed high conformity treatment dose to target within an acceptable dose range. For the total lungs, the average mean dose was 1313.7 cGy. The V5 and V20 of the total lungs were 67.8% and 23.4%, respectively. For the heart, the average mean dose was 2319.2 cGy. The V30 and V35 of the heart were 30.2% and 21.5%, respectively. Conclusion Concurrent chemoradiotherapy using the IMRT technique for treating locally advanced unresectable esophageal cancer is feasible, with better conformity of target volume as well as improved sparing of organs at risk." @default.
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- W2337014711 date "2016-07-01" @default.
- W2337014711 modified "2023-10-13" @default.
- W2337014711 title "Feasibility of intensity-modulated radiotherapy for esophageal cancer in definite chemoradiotherapy" @default.
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- W2337014711 doi "https://doi.org/10.1016/j.jcma.2016.01.013" @default.
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