"Traditionally these head and neck cancers have been more common in people in their 70s, " she said.

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The meta-analysis showed that people with allergies had a 24% reduced risk of developing head and neck cancers.

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Nanospectra is, however, now conducting trials at three medical centres in Texas on people with head and neck cancers.

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Head and neck cancers, which occur in the mouth and throat, affect three times as many men as women, according to the American Cancer Society.

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The research, reported in the online journal PLoS One, found that people with asthma, nasal allergies and other common allergic conditions had a significantly reduced risk of developing head and neck cancers.

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While he was impressed with the results, Pfister says that there is an issue that may make it hard for doctors, patients and insurers to decide how to use the drug: In many cancer centers, patients whose head and neck cancers are of the same severity as those in the trial recieve not only radiation, but also chemotherapy.

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The drug is already approved in China for use with radiotherapy in treating head and neck, lung and esophageal cancers, following Chinese clinical trials.

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The U.S. National Cancer Institute is sponsoring trials that include cancers of the head and neck, kidney, bladder, brain and colon.

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The National Cancer Institute is sponsoring trials that include head-and-neck, kidney, bladder, brain and colon cancers.

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It can be used to detect cancers including those of the lung, colon, head and neck, and gives consultants a detailed three dimensional scan of the affected areas of the body.

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