This trial studies how well proton beam radiation therapy compared with intensity modulated photon radiotherapy works in treating patients with stage I-IVA esophageal cancer. Proton beam radiation therapy uses a beam of protons (rather than x-rays) to send radiation inside the body to the tumor without damaging much of the healthy tissue around it. Intensity modulated photon radiotherapy uses high-energy x-rays to deliver radiation directly to the tumor without damaging much of the healthy tissue around it. It is not yet known whether proton beam therapy or intensity modulated photon radiotherapy will work better in treating patients with esophageal cancer.
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Overall survival (OS)
Timeframe: From the date of randomization to the date of death due to any cause or date of last follow-up for patients without an OS event reported. This analysis occurs after 173 deaths; estimated to occur 4 years after accrual completion
Incidence of specific grade 3+ cardiopulmonary adverse events (AEs) that are definitely, probably, or possibly related to protocol treatment
Timeframe: From baseline up to 8 years