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  • Title: Acid reflux and head and neck cancer risk: A nationwide registry over 13 years.
    Author: Kuo CL, Chen YT, Shiao AS, Lien CF, Wang SJ.
    Journal: Auris Nasus Larynx; 2015 Oct; 42(5):401-5. PubMed ID: 25998850.
    Abstract:
    OBJECTIVE: Gastro-esophageal reflux disease (GERD) is a highly prevalent disorder; however, important questions remain regarding the link between GERD and extra-esophageal cancers. This nationwide cohort study investigated the risk of developing head and neck cancers (HNCs) among patients with GERD. METHODS: Newly diagnosed GERD patients aged ≥20 years without antecedent cancer were included. Case data were obtained from the National Health Insurance Research Database covering period from 1998 to 2010. We compared the standardized incidence ratios (SIRs) of cancer among GERD patients with those of the general population. RESULTS: A total of 98 cancers were identified among the 39,845 GERD patients in the study, representing 128,361 person-years. The SIR for all cases of cancer was 1.59 (95% CI 1.29-1.93). GERD patients exhibited significantly higher SIRs for oropharyngeal (SIR 3.58, 95% CI 1.85-6.25) and hypopharyngeal (SIR 3.96, 95% CI 2.35-6.26) cancers. Male patients had a significantly higher risk of HNCs (SIR 1.70, 95% CI 1.36-2.10), particularly oropharyngeal (SIR 4.01, 95% CI 2.00-7.17) and hypopharyngeal (SIR 3.91, 95% CI 2.28-6.26) cancers. Following adjustment for age and co-morbidities, the hazard ratio was 9.06 (95% CI 4.70-17.44) for males compared to females. CONCLUSION: There may be a potential association between GERD and risk of HNCs, which however merits further studies to confirm the causal relationship. Our observations indicate a need for careful extra-esophageal examination of patients with acid reflux. Our findings also underline the importance of raising awareness among clinicians regarding the possibility of concurrent HNCs in GERD patients with refractory laryngo-pharyngeal symptoms.
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