CERVICAL CANCER MISPERCEPTIONSI just spent much of the last month researching cervical cancer for a friend of mine who had many concerns about her daughters condition. It is only because of this that I have become a temporary expert on the matter.
The medical community has done a horrible job in explaining clearly the underlying causes of cervical cancer. This has resulted in widespread misperceptions, misunderstandings, and inaccuracies. Sadly, I have seen many of these inaccuracies repeated here on this thread. It is important to correct these and to clarify the misperceptions and misunderstandings.
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An amazing medical breakthrough has occurred in the treatment of cervical cancer. Merck has developed a vaccine that is 100% effective in preventing Human Papilloma Virus, or HPV.
This statement is very misleading. First, there are currently at least 13 HPV types that are known to cause cervical cancer.
Source: High-Risk HPV DNA Test, Large pdf file Both the Merck and the Glaxo vaccines apply to
only 2 strains: HPV 16 and HPV 18!
"Two cervical cancer vaccines are currently being developed: GlaxoSmithKline's Cervarix, which targets only HPV 16 and 18, and Merck's Gardasil, which prevents HPV 16, 18, 6 and 11; the latter two viruses cause genital warts. Cervarix could be released on the market as early as spring 2007, months after Gardasil's expected debut in fall 2006, Harper said." (UPI, April 6, 2006) These strains--HPV 16 and HPV 18--are the most common in the U.S. and account for about 70% of all cervical cancers.
(USA Today, May 17, 2006)All other strains currently known to cause cervical cancer--HPV 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, and 68--are
not affected at all by the current vaccines! Thus, one could take either vaccine, be 100% innoculated from HPV 16 and HPV 18, and still be completely exposed to 11 different types of HPV strains known to cause cervical cancer!
This is
not a vaccine for cervical cancer. Not yet, anyway. It is only a vaccine against two common types of the virus that causes cervical cancer.
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HPV has been identified as the primary risk factor for getting
cervical cancer.
HPV is more than just a risk factor. Smoking is a risk factor--probably because it weakens the immune system and allows the HPV to grow into invasive cancer faster. HPV is the CAUSE of cervical cancer. Let me say that again. Carcinogenic strains of HPV have been found to be the exclusive cause of ALL cervical cancers.
“It is now agreed that 100 percent of cervical cancer is caused by HPV,” says Saslow. “The actual number is about 99.7 percent, but it is thought that the 0.3 percent is due to failure of testing rather than the absence of HPV.”
Source: Association of Reproductive Health Professionals"The human papillomavirus (HPV) has been detected in virtually all invasive cervical cancers and has been confirmed as the major cause of this cancer."
Source: University of Maryland Medical Center"...it (cervical cancer) can almost always be traced back to one of those types. In other words, infection with high-risk types appears to be "necessary" for the development of cervical cancer..."
Source: National Family Planning & Reproductive Health Association So, if you have not been infected with a carcinogenic strain of HPV, you have absolutely no chance whatsoever of contracting cervical cancer. None!
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Why in the world aren't I aware that unprotected sexual promiscuity is responsible for 80 percent of cervical cancer? Did you hear about this in your sex ed class? Did anyone? I'd think this information would be more helpful than the vaccine.
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First and foremost, why isn't it common public knowledge that 80 percent cervical cancer is caused by an STD?
HPV is not the cause of only 80% of cervical cancers. HPV is the cause of 100% of cervical cancers! Yes, HPV--a sexually transmitted disease--is the cause of all cervical cancers!
"The human papillomavirus (HPV) has been detected in virtually all invasive cervical cancers and has been confirmed as the major cause of this cancer.
Transmission. HPV is spread primarily through sex with an infected partner."
Source: University of Maryland Medical Center The confusion lies in the fact that 80% of all sexually active women--at some point in their lives--will contract HPV.
"Do all women who have HPV get cervical cancer?
No. While an estimated 80% of sexually active individuals will contract HPV at some point in their lives, most HPV infections appear to go away on their own without causing any kind of abnormality."
SourceIt amazes me to no end why this information is not common knowledge. It seems vitally important. I just can not understand why the medical community has not made this a major part of their public awareness program. Why is this such a big secret?
HPV causes cervical cancer. There! That wasn't so hard.
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Every year, women are expected to have their annual exams and pap smear for this reason. If 80 percent of cervical cancer is caused by HPV, there should be a test to find if a woman has been exposed to HPV, rather than obligating every woman to go to an annual exam for her birth control or lose the privilege because she might be one of the exposed.
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Planned Parenthood tests for HPV during yearly exams, the only cheap, quick way to get a biopsy—perhaps the only way. I don’t know the testing percentage among general practitioners. I wouldn’t mind avoiding a sizeable percentage of the medical cost and discomfort associated with pap smears.
"Tests for Human Papilloma Virus (HPV)
HPV DNA Test. The human papilloma virus DNA (HPV DNA) test can detect the presence of HPV. It does not replace the PAP smear, since many women are infected with HPV but do not go on to develop cervical cancer.
Relying only on an HPV test would lead to a large number of unnecessary and invasive tests. HPV tests, however, may be very useful in specific cases to improve the accuracy of an abnormal PAP smear. They may be particularly helpful for screening older women or when Pap smear results show abnormal cells but it is not clear if they are dangerous or not." Emphasis added.
Source "It (the HPV test) is not recommended as a screening test in women under 30 because the test is not as useful in this population—women in their 20s who are sexually active are much more likely to have an HPV infection (most of which will go away on their own), so the results of the test are not as significant and may be more confusing."
Source: American Cancer Society Basically, doing the HPV test instead of the Pap test will actually increase, not decrease, the number of invasive tests necessary to get accurate screening results.
And, even though doing both tests together will add significantly to the usefulness of the screening, this does not mean that the next screening can be skipped or delayed. There are 2 reasons why. First, if you have a good doctor, you have been told that Pap tests, even when properly done, are highly inaccurate. False negative Pap smear rates can be as high as 50%. The range of false negatives usually quoted is from 10%-29%!
[URL=http://www.sh.lsuhsc.edu/fammed/OutpatientManual/PapSmear.htm]
Source: LSU Health Sciences Center[/URL]
It is only because of the usually very slow growth of cervical cancer (10-15 years),
and routine screening, that a 20% failure rate of Pap tests can still catch the vast majority of cancers in an early stage. When you skip or delay a test, the odds of the cancer slipping through those 20% failures goes way up.
Second, there is a very small subset of fast growing cervical cancers that "may occur quickly after cervical smears qualified as normal--within an interval from 12 to 18 months in women less than 50 years old..."
Source: Pub MedThere just isn't any good reason to take the unnecessary risks of skipping or delaying routine testing.
IN SUMMARY
1. The current vaccines only apply to 2 HPV carcinogenic strains. At least 11 cancer causing strains of HPV are completely unaffected by these vaccines.
2. All cervical cancers (100 percent) are caused by HPV.
3. HPV is a sexually transmitted disease.
4. Pap tests have a very high false negative rate (10%-29%).
5. Pap tests should not be skipped or delayed, even if taken with a HPV test.Thanks for taking the time to read this.