Misread Pap Smears

In the December 8th issue of the New England Journal of Medicine in the Perspective section, there appears an article, “Making Sense of the New Cervical Cancer Screening Guidelines,” by Dr. S. Feldman.  Dr. Feldman concedes that Pap smear sensitivity is poor, “roughly 50 to 60% [false negative].  She does not in her article explain the relatively poor sensitivity of the test but we can learn easily from other literature that a major contribution to the poor sensitivity of the test relates to improperly identified or interpreted smears.

 

While it is true that multiplying the frequency of smears increases the likelihood in spite of negligent readings that a cervical abnormality will be discovered while the disease is pre-invasive.  There is no study randomized and prospective which proves that.  Someone has simply picked out of a hat a frequency that they think is greater than needed and a frequency that is somehow lesser than needed and it comes to kind of a consensus that after age 21 every three years is frequent enough.

 

Cervical cancer is a very aggressive disease particularly in women who acquire the disease in their 30’s and 40’s.  No intelligent woman knowing she possessed a cervical abnormality would decide to wait three years to do something about it.  Where therefore does the pressure come from to reduce the frequency of looking?  Most women considered healthy to have their gynecologist see them annually and Pap smears are done at this annual exam.  Pap smears are relatively inexpensive.  Of course, even something that is inexpensive becomes expensive when you multiply it by 100,000,000.

 

On the other hand, if a lab is getting $25.00 to $30.00 for every Pap smear it screens and requires the cytotechnologists (not doctors)  who read the slides to read as many as 100 a day, one can see readily where the money is going.

 

I recently questioned during a deposition a cytotechnologist who had screened a slide with obvious severe abnormalities on it which she had in fact marked with screening dots.  She doesn’t know why she put the slide back in the box but she did.  She was having difficult times in her personal life which she had shared with her supervisors and others at the organization that was requiring her to perform as many as 96 screenings a day in spite of her obvious distraction.

 

While 4,000 to 5,000 women are needlessly dying of cervical cancer in the United States every year, cost efficiency is truly in the mind of the beholder.

 

In her article Dr. Feldman goes on to assert that HPV testing done with Pap smears, though recommended by the American Cancer Society every three years, is not recommended by anyone else including the United States Preventative Services Task Force.

 

It is well-know that women who are HPV positive are at much higher risk of developing cervical cancer in women who do not have this characteristic.  It is also well recognized that any sexual encounter with a new person, particularly if it is unprotected sex could result in the transmission of HPV.  Therefore, the fact that a person in a committed relationship is negative for ten years doesn’t mean that they are going to be negative for the next ten.

 

I keep on writing about this even though few hear what I have to say.  It is simply that I am tired of watching my clients die of cervical cancer that was preventable if a person had been allowed to spend more than eight minutes reviewing their slide or were willing to endure the further expense of subjecting the slide to HPV testing.  I wonder which committee of government or the prestigious professional organizations that direct these policies think they are in a position to decide what a woman’s life is worth.  Perhaps if they watched more women die of cervical cancer as has been my unfortunate experience, they would find that testing every year rather than every three and adding HPV testing is cost efficient.

 

What do you think?

 

Jerry I. Meyers

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The Pap Smear – Not Too Many – Too Few

by Jerry Meyers on November 20, 2009

According to the American Cancer Society’s most recent estimate for 2009, 11,270 new cases of invasive cervical cancer will be diagnosed and 4,070 women will die from the disease.

Prior to 1955 cervical cancer was one of the most common causes of cancer death for American women. As a result of the development of the Pap smear screening test between 1955 and 1992, the cervical cancer death rate declined by 74%.

Since half of the cervical cancer cases arise in patients who have never had a Pap smear or whose last Pap smear preceded diagnosis of invasive cancer by more than five years, the problem is not that too many Pap smears are being done but that not enough Pap smears are being done.

Nevertheless, the guidelines for screening of Pap smears have resulted in fewer Pap smears being done. For a test that is misinterpreted when it shows abnormalities between 20 and 40% of the time, frequent repetition of the test is needed to assure one appropriate interpretation. Even when an appropriate interpretation of Pap smears is made and abnormalities are found which require treatment, the appropriate treatment is not given 10% of the time.

For a test associated with little cost, and which is essentially risk free, the pressure to limit the performance of even this test is clearly present.

Matthew Mintz, M.D. writes at KevinMD.com medical web blog on November 17, 2009, “Why Doctors are Doing So Many Unnecessary Pap Smears.” In his opinion piece, Dr. Mintz asserts that the Pap smear is a symbol of our healthcare system’s problems, yet the only evidence he quotes in support of this proposition is a study from the Annuals of Internal Medicine which demonstrates doctors are doing more frequent Pap smears on women than some guidelines recommend.

The fact that more Pap smears are being done does not mean that they are needless and they certainly are not harmful.

When even well-informed physicians can reach such wrong-headed conclusions it is not surprising that it is so difficult to fix the healthcare system.

Where is the alarm about the high rate at which Pap smears are wrongly interpreted as negative when in fact they show ominous changes?

Not all screening tests have been as successful as the Pap smear. The fact that we could have for example better screening tests for breast cancer than a mammogram does not negate the importance of women having an option to have a mammogram. We should be searching for better screening tests improving the performance of existing texts and not failing to screen with the tests available simply because the tests are imperfect.

With such controversy swirling about healthcare reform it is difficult to hear the truth in the midst of all the noise that is being made. Staying well informed and being skeptical is the safest approach to receiving appropriate medical care.

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