Should
you use Hormone Replacement Therapy / HRT if you have a fear of breast
cancer? Dr. Nosanchuk discusses several issues...
Unfortunately,
according to the statistics, one out of 8 women will develop this terrible
disease in her lifetime. This is irrespective of whether she uses hormone
replacement therapy / HRT.
This is a terrifying
prospect. It is the principle reason many women choose to deny themselves
the benefits of HRT. This may be true even when they are aware that
HRT is instrumental in the protection of cardiovascular disease, by
far the most frequent cause of death in menopausal women.
I recently attended
a Mayo Clinic conference that dealt with the topic of of problem solving
in hormone replacement therapy. The lecturer, an expert in the field
and a staff physician at Mayo, related that although some studies showed
a slight increase in the rate of breast cancer associated with estrogen
use, just as many studies showed no relationship at all. His opinion
was that estrogen did not cause breast cancer.
If this
is so, why do some studies show even a slight increase in breast cancer?
One possible reason
is what is called a "surveillance bias." This refers to the
fact that we seem to follow women who use HRT more closely than those
who do not. In order to obtain and continue HRT, a women is required
to see a physician and return at regular intervals. Accordingly, women
on HRT are more likely to have mammograms, physician breast examinations
and to be instructed in breast self examination.
Women who are not
HRT users, may not see their physicians as frequently, are less likely
to undergo regular mammography, or be instructed in self breast examination.
It would be expected,
given this increased surveillance that more cancers would be found in
the HRT group. In addition, women in this group in whom cancers are
discovered tend to have smaller, less aggressive tumors and are more
likely to survive their disease.
If just
as many studies show no increase in the rate of breast cancer, why don't
we hear about them?
The principle agenda
of the media, both print and visual, is to sell advertising. While we
often hear that their purported purpose is to educate you, in almost
all cases the profit motive prevails. Stories that talk about increased
rates of cancer are perceived as having the potential of attracting
more readers or viewers.
Given that
I have this fear of breast cancer, should I use HRT?
Ultimately, this
is a personal choice. The statistics show that women who use HRT are
more likely to live longer and have a better quality of life. This is
especially true in those women who have had an early menopause and/or
had a hysterectomy. In addition, there is no consistent evidence that
post menopausal estrogen use causes breast cancer. However, the continued
perception that estrogen use increases the incidence of breast cancer
precludes many women from using HRT. For these women this may be the
right decision, as to live every day in constant fear would be untenable.
A Summary
Of Some Of The Issues:
(1) Women who are
hormonally deficient, especially those who have had their ovaries removed
and are without the benefit of HRT are known to have higher rates of
death from heart attacks, strokes and osteoporosis.
(2) The fear of
a reoccurrence of breast cancer can be overwhelming and preclude any
thought of using estrogen replacement.
(3) To the best
of my knowledge there has never been a study that showed increased rates
of reoccurrence of breast cancer associated with estrogen use in patients
previously treated for early stage breast cancer.
(4) It is possible
by using alternatives to estrogen such as tamoxifen (Nolvadex), raloxifene
(Evista) and a bisphosphonate (Fosomax) and lifestyle changes, that
the risk of these problems can be diminished.
(5) To the best
of my knowledge there is no over the counter herbal preparation that
is capable of preventing the long term negative health affects of hormone
deprivation.
(6) Most physicians
who are treating a woman with a history of treated early stage non metastatic
breast cancer will discourage them from considering HRT. This is due
to either being unaware that there is no evidence that it increases
reoccurrence or mortality and/or a fear of becoming a malpractice target
if the disease should reoccur.
Included
below is a summary, or abstract of a study published in the American
Journal of Obstetrics and Gynecology and an excerpt of medical education
communication by Dr Rogerio Lobo, a physician, who is a highly regarded
expert in menopause.
Estrogen replacement therapy in women with previous breast cancer.
Am J Obstet Gynecol
1999 Aug;181(2):288-95 (ISSN: 0002-9378) Natrajan PK; Soumakis K; Gambrell
RD Jr [Find other articles with these Authors] Department of Physiology,
Medical College of Georgia, Augusta, Georgia, USA.
OBJECTIVE:
We sought to review the status of patients with breast cancer who were
treated with estrogen replacement therapy and compare the results with
those of nonestrogenic hormone users and women not treated with hormone
replacement.
STUDY DESIGN:
The study group consisted of 76 patients with breast cancer, including
50 using estrogen replacement for up to 32 years, 8 using nonestrogenic
hormone replacement for up to 6 years and followed for up to 11 years,
and 18 using no hormones for up to 10 years. In addition to estrogen
use, 40 of the 50 hormone users were treated with androgens, usually
in the form of implantation of testosterone pellets. Forty-five subjects
were also given progestogens, usually megestrol acetate 20 to 40 mg
for 10 to 25 days each month. The 8 nonestrogen hormone users were treated
with various combinations of testosterone pellets, tamoxifen, and progestogens.
Forty-two of the 50 estrogen users are still being treated in our clinic,
as are 2 of the 8 subjects using nonestrogen hormone. Follow-up was
done through the tumor registry at University Hospital, and those whose
tumor records were not current were telephoned. RESULTS: Of the 50 estrogen
users, 3 have died (a mortality rate of 6%), and the rest have been
followed for 6 months to 32 years, with a mean duration of follow-up
of 83.3 +/- 8.81 months. One of the 8 nonestrogen hormone users has
died (a mortality rate of 12.5%), and the rest have been followed for
2 to 11 years, with a mean duration of follow-up of 72.0 +/- 5. 93 months.
Six of the 18 women not using hormone replacement have died (a mortality
rate of 33.3%), and the rest have been followed for 6 months to 10 years,
with a mean duration of follow-up of 50.5 +/- 6.01months.
CONCLUSION:
Estrogen replacement therapy apparently does not increase either
recurrences or mortality rates. Adding progestogens may even decrease
recurrences. Women with early breast cancer should be offered hormone
replacement therapy after a full explanation of the benefits, risks,
and controversies.
Women's Health Clinical Management - Volume 1
Menopause Management for the Millennium CME
Author:
Rogerio A. Lobo, MD
HRT in the
Context of Disease
An important issue
is whether HRT can be prescribed for postmenopausal women who have been
treated for cancers (eg, breast and gynecologic cancer) or who have
autoimmune diseases (eg, systemic lupus erythematosus [SLE] and multiple
sclerosis [MS]) or other diseases associated with aging (eg, osteoarthritis
[OA] and Parkinson's disease [PD]) or other chronic conditions (eg,
diabetes and epilepsy). No prospective studies with a large number of
patients and a long treatment period have addressed this question.
Breast Cancer
It has been estimated
that the number of breast cancer survivors in the United States may
approach 2.5 million.[280] Moreover, because breast cancer is being
detected at an earlier age and adjuvant chemotherapy can cause ovarian
failure, the number of women becoming menopausal at a younger age after
breast cancer treatment is increasing.[280] Given that the risk of suffering
a recurrence will be low for a large percentage of these women, should
they consider HRT? At least 1 prospective study of HRT after localized
breast cancer indicates that HRT does not seem to increase breast cancer
events.[281] However, the most reasonable course of action for women
who have been treated for breast cancer and who have menopausal symptoms
is to treat the symptoms with alternative therapies. Diet and exercise
are effective for prevention of CVD; weight training and the addition
of bisphosphonates or SERMs (eg, tamoxifen and raloxifene) can reduce
the risk for osteoporosis. Certain dosages of progestins can alleviate
hot flushes, although many oncologists believe that use of any sex steroids
is contraindicated. Nevertheless, in those breast-cancer survivors who
choose HRT [282], the lowest effective doses should be used, and these
women must be monitored carefully.