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Study Links Poor Oral Health to Increased Risk of Head and Neck Cancers
A new study suggests that poor oral health may be linked to an increased risk of developing certain types of cancer. Research conducted by New York University (NYU) indicates that bacteria commonly found in the mouth could raise the likelihood of head and neck cancers, particularly head and neck squamous cell carcinoma (HNSCC).
HNSCC, which affects areas such as the mouth, nose, and throat, is among the most common cancers in Europe, with over 150,000 new cases diagnosed annually. These cancers disproportionately affect men and have a high mortality rate, with more than half of patients dying within five years of diagnosis.
The study, published in the journal JAMA Oncology, identified 13 specific species of bacteria present in the mouth that are associated with a 30% higher risk of developing HNSCC. Researchers found that these bacterial species were consistently linked to the risk of cancer, regardless of the specific location within the head and neck, such as the oral cavity, pharynx, or larynx.
While previous research had suggested a potential link between oral bacteria and cancer, this is the first large-scale study to pinpoint specific bacterial species associated with the disease. Despite this finding, researchers caution that the study only shows a correlation and does not definitively prove that the bacteria directly cause cancer.
“As the results are based on just over 200 cancer cases, more research in larger populations is needed to explore the link between oral hygiene and head and neck cancer,” said Dr. Claire Knight, senior health information manager at Cancer Research UK. Knight, who was not involved in the study, also emphasized that poor oral hygiene should still be considered a risk factor.
The study’s co-author, Dr. Richard Hayes, a professor at NYU’s medical school, advised people to maintain good oral hygiene habits, such as regular brushing and flossing, to not only prevent periodontal disease but also potentially lower their cancer risk.
Researchers plan to investigate further how these bacteria may contribute to cancer development and what can be done to counteract their effects. In the meantime, Knight recommended that people concerned about head and neck cancers should avoid known risk factors, such as smoking and excessive alcohol consumption, which are strongly linked to the disease.
“Cutting down on alcohol intake and finding support to stop smoking are changes you can make to help reduce your risk,” Knight said.
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