Risk factors for second primary neoplasia of esophagus in newly diagnosed head and neck cancer patients: a case–control study

摘要

BackgroundThe prevalence of esophageal neoplasia in head and neck (H&N) cancer patients is not low; however, routine esophageal surveillance is not included in staging of newly-diagnosed H&N cancers. We aimed to investigate the risk factors for synchronous esophageal neoplasia and the impact of endoscopy on management of H&N cancer patients.