Abstract
Radiation-induced esophagitis can cause substantial morbidity. Experiments in lab animals have shown that pretreatment with indomethacin protects the esophagus from radiation damage. We conducted a prospective, double-blind, randomized trial of naproxen vs placebo in patients undergoing thoracic radiation therapy for lung cancer. Twenty-eight patients were enrolled, of which 26 completed the study. Sixteen patients were given a short course of radiation (30 Gy/10 fractions/2 weeks), and 10 patients were given a longer course and a larger dose (40–50 Gy/25 fractions/5 weeks). Half of the irradiated patients were treated with naproxen, 375 mg, taken orally twice a day, and half were given an identical placebo. All patients were given ranitidine 300 mg, taken orally once a day. Study drugs were taken throughout the course of radiation. Endoscopy with esophageal biopsies and brushings was performed before and on the last day of treatment. Patients kept a daily diary for symptom scoring. Symptoms such as chest pain, dysphagia, odynophagia, and/or heartburn were reported in 15 patients from both subgroups, resulting in diet restriction to liquids only in eight patients and requiring temporary discontinuation of radiation therapy in one of them. Approximately half the patients in each subgroup developed esophagitis, usually mild and usually limited to the proximal esophagus. Severity of symptoms was not proportional to the severity of esophagitis. Candidiasis was documented in eight patients, but only four had symptoms that were severe in one. We conclude that acute radiation injury to the esophagus is observed in approximately half the patients receiving radiation therapy and can result in substantial morbidity. Treatment with a prostaglandin inhibitor, naproxen, was not protective. Esophagitis may be complicated by esophageal candidiasis, but its contribution to the patient's morbidity is unclear.
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Soffer, E.E., Mitros, F., Fred Doornbos, J. et al. Morphology and pathology of radiation-induced esophagitis. Digest Dis Sci 39, 655–660 (1994). https://doi.org/10.1007/BF02088356
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DOI: https://doi.org/10.1007/BF02088356