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But were instead found at the base of the tongue or on the tonsils. Researchers began attributing many of these cancers to HPV 16, the strain of the virus which also causes most cervical cancers.A 2011 study by researchers at Ohio State University, for example, tested tumor samples from 271 patients diagnosed with certain types of throat cancer between 1984 and 2004. 

HPV was found in only 16 percent of the samples from the 1980s but in 72 percent of those collected after 2000. The researchers estimated that overall, throat cancers caused by the virus increased from 0.8 cases per 100,000 people in 1988 to 2.6 cases per 100,000 people in 2004. If the trend continues, they said, by 2020 the virus will?cause more throat cancer than cervical cancer each year. Fortunately, oral cancers caused by HPV are easier to cure that those caused by other factors.

Michael Douglas may be right that oral sex caused his cancer—his tumor was at the back of his tongue, and it would explain why he was given such a good prognosis, despite the late diagnosis. However, as infectious disease specialist Kent Sepkowicz notes in his piece for the Daily Beast, the epidemiology of cancer is complicated, and a straight cause-and-effect relationship is hard to pin down. 

He cautions that we should not be too quick to blame oral sex—or only oral sex—and points to other research that has found between 8 and 40 percent of patients with oral cancer reported never having performed oral sex. In fact, the authors of that study found that “the lifetime number of sex partners conferred as much risk for oral cancer as does oral sex.”? Moreover, no research has been able to determine why men are far more likely to develop oral cancers than women. If oral sex was the only culprit, it would seem that women would become infected as well.

 Sepkowicz concludes:Still, he believes, as I do, that Douglas’ pronouncement will ultimately be good for public health, and here is why: It will remind people that HPV causes cancer. And t.al therapy    Scale-up implementation of proven HIV prevention strategies, develop additional effective prevention strategies. 

Such as a vaccine, and build on current successes in pre-exposure prophylaxis, microbicides and treatment-as-prevention to achieve a sustainable and comprehensive, combination HIV prevention strategyIn their paper, the authors explore the challenges and opportunities associated with each of these goals, noting that an integrated strategy combining a variety of effective public health tools is needed to successfully curb HIV/AIDS in the future.

12/23/2015 04:42:45 am

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