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Sex orally has grown in recent years smoking in the classification of the most dangerous risk factors associated with launching cancer orofaringian, especially the young Americans, according to a study which did not explain fully causes the phenomenon, told AFP.

The common point lies in the presence of cancerous tumors of the papilloma virus (HPV) responsible for the most common sexually transmitted infections are also the leading cause of cervical cancer.
People infected with these viruses, especially HPV-16 strain, "faced with a risk of oropharyngeal cancer 32 times higher than the general population, this risk is considerably higher than that associated with smoking, which is only three times higher, "said Maura Gillison, MD, University of Ohio, at the annual conference held this week in Washington by the American Association for the promotion of Science (AAAS). American doctor who studies this issue for over 15 years, said on this occasion that people who maintain relationships with more than six bucogenitale partners face a lifetime risk of oropharyngeal cancer for more than eight times higher than the general population , Mediafax reported.
In addition, the rapid progression was recorded among white men, said Maura Gillison, adding that this "remains unexplained, however. In total, mouth and throat cancers increased by 225% from 1974 to 2007, most of these cases were registered in patients who were admitted to maintain relationships bucogenitale. American doctor said also that this conclusion was obtained from observational studies and that they should be further confirmed by other statistical research.
"We can not prove with certainty that certain sexual behaviors are associated with a higher risk of being infected with papilloma virus. We do not have enough data yet to determine if this virus detection can be used for diagnosis of oropharyngeal cancer," said Maura Gillison. As a preventive measure, doctors recommend vaccinating Americans, including men, which protects against four strains of papilloma virus, responsible for the occurrence of 70% of all cases of cervical cancer and genital warts.
Oropharyngeal cancer, if treated in time, it is often curable. 90% of patients survive at least five years of diagnosis. But the "explosion" of cases among young people, especially in the United States of America - in other countries in the world smoking remains the leading cause - is disturbing enough to justify organizing campaigns for the population. Oral sex is the most common sexual practice among teenagers in the U.S., said Bonnie Halpern-Felsher doctor, professor of pediatric medicine at the University of California, San Francisco, author of a study on this topic.
quot;This study clearly showed that young Americans consider oral sex as less risky than conventional intercourse," said the doctor. In her opinion, "bucogenitale sexual practices must, therefore, be included among the officially recognized risk factors and prevention messages printed buccal diseases such as cancer."
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Sexul oral a depasit in ultimii ani fumatul in clasamentul celor mai periculosi factori de risc asociati cu declansarea cancerului orofaringian, mai ales in cazul tinerilor americani, potrivit unui studiu care nu explica pe deplin cauzele acestui fenomen, relateaza AFP.

Punctul comun consta in prezenta la nivelul tumorilor canceroase a unor papiloma virusuri (HPV), responsabile de cel mai frecvent intalnite infectii transmisibile pe cale sexuala si care sunt, totodata, principala cauza a aparitiei cancerului de col uterin.

Persoanele infectate cu aceste virusuri, in special cu tulpina HPV-16, "se confrunta cu un risc de cancer orofaringian de 32 de ori mai mare decat restul populatiei, acest risc fiind considerabil mai mare fata de cel asociat cu fumatul, care este doar de trei ori mai mare", a declarat Maura Gillison, medic la Universitatea din Ohio, cu ocazia conferintei anuale organizate in aceasta saptamana la Washington de Asociatia americana pentru promovarea stiintei (AAAS).

Medicul american, care studiaza aceasta tema de peste 15 ani, a declarat cu aceasta ocazie ca persoanele care intretin raporturi bucogenitale cu mai mult de sase parteneri pe parcursul vietii se confrunta cu un risc de cancer orofaringian de peste opt ori mai mare comparativ cu restul populatiei, informeaza Mediafax .

In plus, progresia cea mai rapida a fost inregistrata in randul barbatilor albi, a precizat Maura Gillison, adaugand ca acest fenomen "ramane insa inexplicabil".

In total, cancerele cavitatii bucale si ale gatului au crescut cu 225% din 1974 pana in 2007, cele mai multe dintre aceste cazuri fiind inregistrate la pacienti care au recunoscut ca au intretinut raporturi bucogenitale.

Medicul american a precizat, totodata, ca aceasta concluzie a fost obtinuta in urma unor studii observationale si ca ele trebuie sa fie confirmate prin alte cercetari statistice viitoare.

"Nu putem sa demonstram cu certitudine ca anumite comportamente sexuale sunt asociate cu un risc superior de a fi infectat cu papiloma virus. Nu dispunem inca de date suficiente pentru a determina daca detectarea acestui virus poate fi utilizata pentru diagnosticarea cancerului orofaringian", a adaugat Maura Gillison.

Ca masura de preventie, medicii americani recomanda vaccinarea, inclusiv pentru barbati, care protejeaza contra a patru tulpini de papiloma virus, vinovate de aparitia a 70% din totalul cazurilor de cancer de col uterin si de negi genitali.

Cancerul orofaringian, daca este tratat la timp, este adeseori vindecabil. 90% dintre pacienti supravietuiesc cel putin cinci ani de la diagnosticare.

Insa "explozia" cazurilor inregistrate in randul tinerilor, in special in Statele Unite ale Americii - in alte tari din lume fumatul ramane principala cauza -, este suficient de ingrijoratoare pentru a justifica organizarea unor campanii de informare a populatiei.

Sexul oral reprezinta practica sexuala cea mai frecventa in randul adolescentilor din Statele Unite, a precizat medicul Bonnie Halpern-Felsher, profesor de medicina pediatrica la Universitatea California din San Francisco, autorul unui studiu pe aceasta tema.

"Acest studiu a aratat in mod clar ca tinerii americani considera sexul oral ca fiind mai putin riscant decat actul sexual conventional", a declarat acest medic.

In opinia ei, "practicile sexuale bucogenitale trebuie, din acest motiv, sa fie incluse in randul factorilor de risc oficial recunoscuti si in mesajele tiparite de preventie a bolilor precum cancerul bucofaringian".
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