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Πέμπτη 26 Απριλίου 2018

Medical History, Medication Use, and Risk of Nasopharyngeal Carcinoma

Abstract
Because persistent inflammation may render the nasopharyngeal mucosa susceptible to carcinogenesis, chronic ear/nose/throat (ENT) disease and its treatment might influence the risk of nasopharyngeal carcinoma (NPC). Existing evidence is, however, inconclusive and often based on methodologically suboptimal epidemiologic studies. In a population-based case-control study in southern China, we enrolled 2532 NPC cases and 2597 controls aged 20–74 years from 2010 to 2014. Odds ratios were estimated for associations between NPC risk and history of ENT and related medications. Any history of chronic ENT disease was associated with a 34% increased risk of NPC. Similarly, use of nasal drops or aspirin was associated with approximately doubled risk of NPC. However, in secondary analyses restricted to chronic ENT diseases and related medication use at least 5 years prior to diagnosis/interview, most results were statistically non-significant, except a history of uncured ENT diseases, untreated nasal polyps, and earlier age at first diagnosis of ENT disease and first or most recent aspirin use. Overall, these findings suggest that ENT disease and related drug use are most likely early indications rather than causes of NPC, although the possibility of a modestly increased NPC risk associated with these diseases and related drugs cannot be excluded.

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