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Understanding the Cancer-Causing Virus, HPV

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Cancer related image Photo: Getty Images

There are three viruses known to cause cancer, one of them is HPV or Human Papillomavirus. While this virus has been in the news lately, it has actually been around for several hundred years.

HPV is typically referred to as an STI (sexually transmitted infection) because it is transferred, for the most part, during sexual activities. I say activities because it does not require actual intercourse to spread the virus but merely skin-to-skin contact predominantly with mucous membranes such as occur in the vagina, mouth and anus.

HPV has an incubation period of approximately three months after which, symptoms may appear. However, this is often called the symptomless disease because, more often than not, it produces no symptoms at all. The body’s immune system can then suppress the virus and it can remain dormant in the body for weeks, months and even years. Because of this, it can return again later in life for a multitude of reasons not fully understood.

Some of these may include a decrease in the person’s immune system or an increase in viral load, the amount of the virus the body is exposed to. Reducing the viral load is one reasons why wearing condoms, even if in a monogamous relationship, remains important.

The human papillomavirus has what are referred to as high and low risk strains. A strain refers to the same virus with a slight difference. There are more than 150 strains of HPV documented to date. Some of these low risk strains cause such things as the warts found the hands and plantar warts on the feet. Other low risk strains cause genital warts.

High risk strains of HPV, thirteen of which are regularly tested for, can, if persistent, result in dysplasia or a changing within the normal cells. Dysplasia can occur in varying degrees basically low, intermediate and high risk for causing cancer.

Dr. Ralph Richart, M.D., and pathologist at Columbia Presbyterian Medical Center in New York City developed the term intraepithelial neoplasia (IN) meaning an abnormal change within the epithelial layers of the skin. The letter symbolizing the part of the body affected comes before such as CIN for cervical intraepithelial neoplasia and so on.

Add a Comment4 Comments

Thank you for pointing this out. It is the high risk strains togther which cause 99.9% of cervical cancers, HPV16 and 18 which are covered by Gardasil are responsible for 70% of the 99.9%. That should have been worded differently to clarify it for the reader.

July 29, 2011 - 3:31pm
EmpowHER Guest

I'm concerned that you may have some facts wrong. Forgive me if I'm mistaken, but I believe that Gardasil protects against 2 high risk strains of HPV that cause up to 70 percent of cervical cancer, not 99 percent. In fact, at least one study found that even prior to the introduction of Gardasil, one of those strains had lost ground to others and the two highest risk were causing 66 percent of cervical cancers in that area.

I believe that Cervarix protects against a couple more strains but not against genital warts.

LOL about comment to dating site ad.

July 29, 2011 - 9:27am
EmpowHER Guest

I have HPV and I am an engineer who works for the largest STD dating and support site STDslove. com. I have to tell you a secret, you can choose not to believe me. But the truth is that this site has more than 1,880,000 members and about 80% members are good looking in my estimation.

Unfortunately, STD rates soar worldwide and most people with STDs don't even know that they have them. The government should grant more money for STD education to lower the rates of STD transmission.

July 27, 2011 - 12:31am
(reply to Anonymous)

Anonymous - You are absolutely right, the government has failed miserably in educating the public about HPV. The only real "education" people have received is from the pharmaceutical companies who make the tests or the vaccines who of course have conflicts of interest. Unfortunately most peole think that HPV only affects the cervix because of Merck's campaign portraying it as a way to prevent cervical cancer. As a result, few are aware of how far HPV can reach and that if affects many other areas as well.

The medical community also needs to educate their members because much erroneosu information is passed on by poorly educated doctors and nurses as well. The ASCCP has a wonderful CME program on HPV but not well advertised so few aside from their direct members are aware of it. The more the medical community understands about this virus the better the care they can provide to their patients.

When it comes to STD dating sites, I have heard many individualas mentino that if they already have an STI and are well aware from the nature of the site alone that the members will have an STi as well that the last thing they want is a second STI. I can understand this especially as somone who has dealt with multiple cancers from HPV. One STI is enough for me personally but others may be willing to venture into relationships yet again.

July 27, 2011 - 5:00am
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