Men are twice as likely as women to
get cancer of the mouth and throat linked to the human papillomavirus, or HPV,
one of the most common sexually transmitted infections, researchers say.
Love
For men, the risk of HPV-driven cancers of the head and neck rise along with
the number of oral sex partners, researchers said Friday at the American
Association for the Advancement of Science (AAAS) annual meeting in the US
capital.
She said her research shows that youths are engaging in oral sex at
increasingly young ages, compared to past generations.
“Our research shows that
for men, the number of oral sex partners — as that number increases, the risk
of an oral HPV infection increases,” she told reporters.
But with women, the
number of sexual partners does not appear to raise the risk. “Comparing men and
women with the same number of sexual partners, a man is much more likely to
become infected with oral HPV than a woman.”
Furthermore, women who have a
greater number of vaginal sex partners appear to face a lower risk of oral HPV
infection, she said.
The reason may be that when women are first exposed to HPV
vaginally, they mount an immune response that prevents them from getting an
oral HPV infection, she said.
But men do not seem to have equally robust immune
responses. “Men are not only more likely to be infected with oral HPV infection
than women, but our research shows that once you become infected, men are less
likely to clear this infection than women, further contributing for the cancer
risk.
” HPV infection is quite common, and most people clear the virus within a
year or two, she said. In some cases, however, HPV does not go away and can
lead to cellular changes in the mouth and throat, which eventually become
cancerous.
Oral sex may raise the risk of head and neck cancer by 22 percent,
according to a study published January in the Journal of the American Medical
Association (JAMA).
This type of cancer has risen 225 percent in the last two
decades. The US Centers for Disease Control and Prevention (CDC) urges HPV
vaccination for all pre-teen boys and girls so they can be protected against
the infection before they become sexually active.
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