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- W4220716687 abstract "Hypofractionated radiation therapy has been safely implemented in the treatment of early-stage non-small cell lung cancer (NSCLC) but not locally advanced NSCLC owing to prohibitive toxicities with photon therapy. Proton therapy, however, may allow for safe delivery of hypofractionated radiation therapy. We sought to determine whether hypofractionated proton therapy with concurrent chemotherapy improves overall survival.The Proton Collaborative Group conducted a phase 1/2 single-arm nonrandomized prospective multicenter trial from 2013 through 2018. We received consent from 32 patients, of whom 28 were eligible for on-study treatment. Patients had stage II or III unresectable NSCLC (based on the 7th edition of the American Joint Committee on Cancer's staging manual) and received hypofractionated proton therapy at 2.5 to 4 Gy per fraction to a total 60 Gy with concurrent platin-based doublet chemotherapy. The primary outcome was 1-year overall survival comparable to the 62% reported for the Radiation Therapy Oncology Group (RTOG) 9410 trial.The trial closed early owing to slow accrual, in part, from a competing trial, RTOG 1308. Median patient age was 70 years (range, 50-86 years). Patients were predominantly male (n = 20), White (n = 23), and prior smokers (n = 27). Most had stage III NSCLC (n = 22), 50% of whom had adenocarcinoma. After a median follow-up of 31 months, the 1- and 3-year overall survival rates were 89% and 49%, respectively, and progression-free survival rates were 58% and 32%, respectively. No acute grade ≥3 esophagitis occurred. Only 14% developed a grade ≥3 radiation-related pulmonary toxic effect.Hypofractionated proton therapy delivered at 2.5 to 3.53 Gy per fraction to a total 60 Gy with concurrent chemotherapy provides promising survival, and additional examination through larger studies may be warranted." @default.
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- W4220716687 date "2022-07-01" @default.
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- W4220716687 title "Chemoradiation with Hypofractionated Proton Therapy in Stage II-III Non-Small Cell Lung Cancer: A Proton Collaborative Group Phase 2 Trial" @default.
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- W4220716687 doi "https://doi.org/10.1016/j.ijrobp.2022.03.005" @default.
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