Statement of The College of American
Pathologists For the Health and Environment Subcommittee
Hearing On Women's Health And Raising Awareness Of Cervical
Cancer
March 16, 1999
The College of American Pathologists is pleased to submit this
statement for the record of the Health And Environment
Subcommittee's hearing on women's health and raising the awareness
of cervical cancer. The College is a medical specialty society
representing nearly 16, 000 physicians who practice clinical and/or
anatomic pathology in community hospitals, independent clinical
laboratories, academic medical centers, and federal and state health
facilities.
Raising the awareness of cervical cancer and the Pap smear and
improving the socioeconomic climate for this important service has
been a priority of the CAP for most of this decade. We are very glad
to see the attention that is now being focused on cervical cancer
and its diagnosis and treatment.
Cervical cancer was one of the leading causes of cancer deaths in
women in the United States 50 years ago. It is still a major killer
of women worldwide. The death rate has decreased over 70%, largely
due to the advent of cytology screening by Papanicoloau smears --
Pap smears. However, invasive cervical cancer is still diagnosed
with regularity. The 1998 annual estimates were 13,700 new annual
U.S. cases and 4,900 deaths. It is the second cause of cancer deaths
in young women age 20-39 worldwide. There appears to be a trend of
increasing rates in certain segments of the population, after years
of declining rates.
Currently there is inadequate Pap smear screening of the entire
U.S. population at risk. According to a 1996 National Institutes of
Health Consensus Conference, most women diagnosed with cervical
cancer have never had cytology screening (50%) or have not been
screened within the past five years (10%). Far too many women who
are past childbearing years, who are of Asian or Hispanic origin, or
who are Native American do not receive regular screening. The
most effective way to decrease cervical cancer mortality is to
provide for annual screening of all women at risk.
The usual natural history of cervical cancer is several years of
a precancerous process. Therefore, any evidence of cervical cancer
that is missed on one Pap test will likely be detected the next time
the Pap test is given. This makes annual testing critical to
detection of the disease at a time when it is usually easily
treatable. Therefore, the CAP advocates that, in general, all women
who are or have been sexually active, or have reached 18 years of
age, should have an annual cervical cytologic examination (Pap test)
and pelvic examination.
There are several major issues related to cervical cancer and Pap
smear testing that the CAP will discuss. Those issues are:
1. Less than ideal sensitivity of a single Pap smear screening
test, and the importance of regular screening 2. Inability to
predict which women with atypical cytology results are at high risk
for cancer 3. Unrealistic expectations of cytology screening,
causing a liability crisis for laboratories 4. Below cost
reimbursement of cytology screening
Sensitivity of Pap smear Screening and the Importance of
Regular Screening
Sensitivity refers to the ability of a test to identify an
abnormality. The Pap smear, while very effective, is a screening
test with several limitations. A single Pap test will certainly not
detect all cancers and precancers. Cervical cytology screening has
several phases, and any one can be plagued by problems. The
practitioner must first obtain an adequate sample representative of
any cervical cancers/precancers. Second, the laboratory must prepare
and stain the sample. Next, specially trained and certified
cytotechnologists screen the entire sample for abnormal cells.
Finally, any suspected abnormalities are reviewed and confirmed by a
pathologist.
The Agency for Health Care Policy and Research recently released
an evidence report entitled "Evaluation of Cervical Cytology." One
of the main conclusions was "the conventional Pap test is less
sensitive than it is generally believed to be". Only a few studies
were used for the AHCPR analysis, and sensitivity was estimated to
be 51%. A recent population-based study sponsored by the National
Cancer Institute of 7,323 women in the high-risk Guanacaste region
of Costa Rica was published after the AHCPR analysis. Because of the
extensive testing of all women with any atypical result, as well as
colposcopy on a fraction of women with negative results, this type
of population-based study has advantages over those studies analyzed
by the AHCPR. The sensitivity of the Pap smear for any abnormality
was 69.5%, and it increased to 79.8% when only high-grade precancers
and cancers were considered.
A "false negative" Pap smear is one, which fails to identify
evidence of disease that is present in the patient. It is estimated
that at least half of false negative Pap smear results are due to
sampling error, that is, abnormal cells are not captured by the
cervix-sampling device or are not present on the slide. Routine
reporting of specimen adequacy parameters by laboratories has been
promoted by the Bethesda Terminology for Reporting Cervical/Vaginal
Cytologic Diagnoses, and a recent questionnaire survey conducted by
the CAP found that nearly all U.S. laboratories (92%) were currently
doing so. Improved methods of sampling in the future may also help
decrease sampling errors. However, some cervical cancers are not
sampled because of their location high in the cervical canal, and
certain cancers do not shed cells on the surface where they are
accessible to sampling devices. Also, just because a smear appears
to the laboratory to be satisfactory, there is no guarantee that the
practitioner sampled the entire circumference of the cervix.
Practitioners and patients need to be educated that suspicious
symptoms and lesions require biopsy or other intervention, even if a
cytology sample is negative.
The screening and interpretation of cytology slides takes immense
concentration and human judgment. The cytotechnologist may be
searching for a few abnormal cells among 200,000 or more normal
cells. Both cytotechnologists and pathologists may make interpretive
errors, mistaking abnormal cells for normal ones, and vice versa.
Cells of the cervix are affected by a multitude of factors,
including age, time of menstrual cycle, hormonal status, and drug
therapy, etc. Some cancer cells closely resemble those found in
infectious and benign conditions, and experts often fail to
interpret the same sample in the same way.
Under the Clinical Laboratory Improvement Amendments of 1988,
laboratories must comply with complex cytology regulations which
emphasize numerous ongoing quality assurance parameters that are
designed to improve Pap smear accuracy and reduce the false negative
rate. A large number of laboratories also participate in voluntary
peer-review programs such as those of the CAP. Cytology laboratories
inspected by the CAP's Laboratory Accreditation Program participate
in peer-review interlaboratory comparison glass slide programs. The
glass slide program of the CAP enrolls nearly 2000 laboratories, and
similar programs enroll several hundred more.
While a national proficiency testing program has not yet been
implemented, most pathologists and cytotechnologists do not believe
that such testing will significantly affect cervical cancer
mortality and morbidity. Proficiency testing is an artificial view
of screening/interpretive skills, since individuals are aware they
are being tested. Other quality measures already in use have a
larger impact on false negative rates.
The CAP does not believe that a lower false negative rate can be
legislated or regulated. Several studies rescreening large numbers
of slides have found that there is an irreducible laboratory false
negative rate of at least 5% in high quality laboratories. Recent
Food and Drug Administration trials, also performed in high quality
laboratories provide a more realistic estimate of laboratory false
negative rates. In such analyses, about 15% of precancers and
cancers are missed on the first screening event, and detected on the
second. If one assumes that laboratory false negatives account for
about half of all errors, this provides a similar estimate to the
30% false negative rate found in the Guanacaste study.
New cytology technologies may decrease but will not eliminate
false negative results and screening devices will impact almost
exclusively on screening errors. As sampling errors are the largest
single cause of false negative results, it is unrealistic to expect
that new technologies alone will eliminate cervical cancer deaths.
Given the inherent limitations of a single screening event and
the less than ideal sensitivity, it is vital that women be screened
regularly. As indicated above, the usual natural history of cervical
cancer is several years of a precancerous process. Therefore,
lesions missed on one screening event will likely be detected the
following year. A false negative rate of even 30% declines to less
than 5% with three screening events; this means the sensitivity
increases from 70% to over 95%. Further annual screens can increase
the sensitivity to over 98%.
Limitations in Ability to Predict Which Women with Abnormal
Cytology Results are Actually at Risk for Cancer and High Grade
Lesions
Precancerous processes are considered to be either high grade
(high risk for cancer) or low grade (low risk for cancer) lesions.
High grade precancers are most likely to progress to cancer, but
such processes account for the minority of abnormal cytology
results. The majority of low grade lesions regress without
treatment. The largest single category of cytology abnormality is
Atypical Squamous Cells of Undetermined Significance (ASCUS). Women
with ASCUS have a variety of diagnoses on follow-up, including
infections and precancers. According to a recent CAP questionnaire
survey, the median reporting rates for various types of abnormal
cytology results were as follows:
ASCUS: 4.5% Low Grade Squamous Intraepithelial Lesion (LSIL):
1.6% High Grade Squamous Intraepithelial Lesion: 0.5%
High grade lesions are the least frequent of the precursors, and
all women with such diagnoses require further evaluation and
treatment. While most women with ASCUS and LSIL have either benign
processes or low grade lesions which will regress, about 5-20% have
high grade lesions or cancers upon further evaluation and follow-up.
This is the reason that colposcopy and histologic biopsy studies are
generally performed on such women. However, such aggressive
evaluation in so many women with abnormal cytology results is very
expensive. Clinicians and pathologists need better tools to identify
which women with ASCUS and LSIL are more likely to progress. The CAP
supports federally sponsored research studies like the ASCUS/LSIL
Triage Study now being performed under the direction of the National
Cancer Institute.
The CAP also supports ongoing research on methods which may
prevent cases of cervical cancer and precancers in the future. These
include the development of vaccines and measures to prevent
transmission of etiologic agents including the Human papillomvirus.
Unrealistic Expectations of Pap Smear Screening Causing a
Liability Crisis for Laboratories
The success of the Pap smear in decreasing cervical cancer
mortality has led to unrealistic expectations by the public and even
other medical professionals. The public now expects perfection and
lawsuits for alleged errors are commonplace. Some advertisements in
the popular press inform patients that, if they have cervical
cancer, they should file a lawsuit. Pap smears are now the leading
cause of liability for pathologists and laboratories and most of
these lawsuits allege that laboratories are not meeting the standard
of practice because of a false negative result. As discussed
earlier, the sensitivity of the Pap is less than ideal and false
negative cases are found in every laboratory.
A related problem is that expert witnesses may not, in their
opinions, reflect an understanding of the inherent limitations of
the Pap smear and the irreducible false negative rate. To assist
states in addressing the Pap smear liability problem, the CAP
developed Guidelines for Review of Pap Smears in the Context of
Litigation or Potential Litigation. The guidelines set forth
standards for evaluation of Pap smear cases that can be used by
courts and others involved in litigation. The guidelines, in part,
recognize that a false negative result is not sufficient proof of
negligence and set a "reasonable and prudent practitioner" standard
of care. The guidelines also say that compensation of a
physician-witness should reasonably reflect the time and effort
expended by the witness in preparation, depositions, and trial and
should not be contingent on the outcome of the case.
These guidelines have been adopted by the American Society of
Cytopathology and several state cytology organizations. Many state
pathology, cytology and medical societies have either adopted the
guidelines or developed similar recommendations.
Below Cost Payment for Pap Smear Screening
Although Congress has acted twice in the last decade to establish
and expand the Medicare screening Pap smear benefit, the payment
policy has not been supportive of community provision or promotion
of the benefit. Medicare payment for this important cytology service
is capped at $7.15 nationwide whereas the cost of the service is
between $13.00 and $17.00 in most laboratories.
The CAP believes that it is important to encourage local
community provision of Pap smears so that correlation of cytology
and histology findings is easier and communication between the
pathologist and the attending physician is facilitated. When Pap
smears are provided at a laboratory that has not provided the
histology service such as the cervical biopsy, cytology-histology
correlation becomes more time consuming and thus more costly and may
be waived in the spirit of cost containment that now pervades health
care provision. Communication with the attending physician also
becomes more cumbersome.
We believe that there are strong community service and quality of
care motives among pathologists, hospitals and others to provide the
Pap smear locally were it not plagued with such strong economic
disincentives. But most Pap smears are not provided locally and the
service is not promoted with the same vigor that breast cancer,
prostate cancer, HIV, osteoporosis, heart disease and many other
disease prevention and detection programs receive. We believe that
this lack of community health care provider promotion is tied to the
poor socioeconomic climate for the service.
We have asked the Health Care Financing Administration to
increase payment for the Pap smear to somewhere between $13.00 and
$17.00 so that the costs of the service will be covered in most
local laboratories. Last year, Congress agreed with us when, as part
of the conference report accompanying the Omnibus Appropriations
legislation for fiscal year 1999, the Secretary of the Department of
Health and Human Services was "urged to act as soon as possible to
increase the Medicare payment for the screening Pap smear." The
report expressed concern about the large disparity between the
average $13.00 to $17.00 costs and the Medicare payment to $7.15 and
stated the belief that adequate payment is a necessary component of
ensuring women's access to quality Pap smears. The CAP agrees.
We are pleased to see that Congress is interested in pursuing
this goal again this year. On January 6, bipartisan Concurrent
Resolution 5 was introduced in the House of Representatives. This
resolution recognizes the severity of the issue of cervical health
and calls for support for cervical cancer patients and their
families and education about the disease so that early detection can
be ensured. On March 4, H.R. 976, the Investment in Women's Health
Act of 1999, was introduced, also with bipartisan sponsorship. This
bill would set a floor of $14.60 for Medicare payment for the Pap
smear beginning in the year 2000. Sponsors of the bill are steadily
increasing. In addition, a second Concurrent Resolution is expected
to be introduced this month that emphasizes the importance of
federally funded programs that provide Pap smear services.
We ask for the support of this committee in our efforts to
increase payment for Medicare manual Pap smears.
We also want to ensure that, if Medicare payment is increased, it
must not be allowed to erode in future years because of broad budget
reduction initiatives aimed at other services. Very often the
Congress legislatively eliminates or limits the CPI updates to the
Medicare clinical laboratory fee schedule and/or reduces the
percentage of the median of carrier fee schedules that is used to
calculate the national limitation amounts (the caps). The Balanced
Budget Act of 1997 eliminated the inflation updates through the year
2002. There is discussion among members of the Bipartisan Commission
on the Future of Medicare of extending that provision through 2007.
The Administration's budget proposal for 2000 included a reduction
in the national cap formula from 74 percent to 72 percent of the
median of carrier fee schedules.
We believe that it would be inconsistent with the intent of any
decision to improve payment for Medicare Pap smears to allow that
sound policy decision to be eroded by subjecting the service to
eliminated inflation updates and reductions in national caps in
subsequent years. Regardless of the amount of any improvement that
is made in Pap smear payment, for that improvement to be meaningful
in the long term it will be essential that the service receive
inflation updates in subsequent years and not be the subject of
national cap reductions.
We ask for your support in ensuring that the manual Pap smear
receives full CPI updates and are not subject to reductions in the
national caps. We believe that a legislative solution to this issue
will be needed and we will be pursuing that approach at the
appropriate time. We would appreciate your support in these efforts.
CAP Public Health Initiatives to Raise Awareness of
Cervical Cancer
During the past decade the CAP has been a leader in raising the
awareness of cervical cancer and the importance of annual Pap smear
screening. The CAP brought together a coalition of major medical
associations and consumer and government organizations in response
to the growing concern that women are failing to have annual Pap
smears for lack of information and time. A CAP-funded Gallup survey
in 1997 revealed that nearly half of women aged 50 or older had not
had a Pap test in the last year and sixteen percent had not had a
test in five years or more. This is of great concern because studies
show that nearly 60 percent of cervical cancers diagnosed each year
are in women who are 55 or older.
The CAP public service toll free line, 800-LAB-5678, can be
contacted for information about CAP Pap smear promotion material.
Our brochure, Pap Examination: It Can Save Your Life and fact
sheets, FACTS ABOUT CERVICAL CANCER AND PAP SMEARS and
MYTHS AND FACTS provide useful information about the
importance of Pap testing and dispel common myths about cervical
cancer and the Pap smear. A copy of Pap Examination: It Can Save
Your Life is attached to this statement.
In May 1999, the CAP is establishing a Web site where women can
register to receive an e-mail reminder, on the date they choose, to
schedule and have an annual Pap smear.
Conclusion
The CAP is pleased that the Subcommittee is addressing the
important public health issue of awareness of cervical cancer. We
would welcome the opportunity to work with the subcommittee to
address the many issues raised in our statement. Several issues that
we have discussed are interrelated. Together they discourage both
the promotion of cervical cancer detection awareness and the
expansion of Pap smear screening for segments of the population that
are at highest risk--women who do not have annual Pap tests such as
older women, Native Americans and women of Asian or Hispanic origin.
Pathologists and local laboratories have a strong public health and
quality assurance motive to provide Pap smears at the local level,
but have strong economic disincentives not to do so. We would
appreciate your support in correcting that problem.
We believe that the most effective action to reduce deaths from
cervical cancer is through public education and programs targeted to
women most at risk that encourage and support annual Pap smears.
Thank you for the opportunity of submitting this statement.
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