This is the largest risk factor of them all. Each year, almost 200,000
women in the U.S. discover that they have breast cancer. About 1,500 men
will get breast cancer. Those numbers tell us that the gender of a person
makes a major difference in the probability of a person developing
What can a woman do to help avoid this risk? Nothing, unless we can
identify something that a woman does that a man usually will not do. This
fuels thoughts about clothing, under-garments, make-up, general activity levels, hormones,
etc. Gender re-assignment (sex change) does not seem to make a difference,
although no studies seem to have been done in that area.
The longer a woman (or man) lives, the greater chance the person has of
developing breast cancer. There is nothing that we can do about that
unless we can prevent the actual "cause" of the cancer. Many malfunctions
of the body systems eventually gain enough control to cause death, if
the problem (disease, organ failure, etc.) can last longer than the body's ability to
fight off the problem. The tough part is determining what that "cause"
is. If a woman in the U.S. lives to be older and older, her "odds" of
getting breast cancer get much greater, up until the present risk which is one woman
out of eight, if she lives to the age of 95 years.
Keeping herself healthy by doing proper amounts (and types) of exercise,
and eating proper foods (and proper amounts of food), will undoubtedly
assist the body in its defense against all diseases. Cancer could very
well be included as one of those diseases from which our body can defend
If you have a grandmother, mother, aunt or sister (or any similarly
related male) that had breast cancer, there is a chance that the genes
that MIGHT cause breast cancer have passed to you too. If two of them
have gotten breast cancer, there is a slightly higher risk that you got that same gene.
What can a woman do to help avoid this risk? While there is nothing
that we can do about which genes are passed to us, some women have taken
tests (can be a thousand dollars or more... check to see if insurance
will cover that before you decide) to find out if the BRCA1 or BRCA2 genes are
in their genetic makeup. BRCA, by the way, stands for nothing more sinister
than BR (breast) CA (cancer), and as we find more of them, the number
that follows the BRCA designation will
continue to step upward. DNA /genetic / molecular research continues to
identify new genes. There are exciting times ahead of us. Research is continuing
to find answers that will help us.
One solution that some high-risk women have chosen is a prophylactic
bilateral mastectomy, which means that they have both breasts removed
before they have a chance to develop breast cancer. That is a very controversial
decision, and is still being studied. It seems to be warranted more by
the peace of mind that the women that chose it receive, then by the
facts of whether it is statistically a wise choice. Please choose
carefully if you are facing this decision.
Any woman that has had previous breast cancer, in either breast, has a
higher risk of breast cancer. Not only because it may not have been completely
removed the first time, but, we suspect, it could also be because the
condition that caused the cancer the first time continues to create a
problem. The big question is: "What is the source of the breast cancer?".
it be controlled? ", or "Can it be eliminated? "
What can a woman do to help avoid this risk? There is nothing that we
can do to change history, but a woman with a history of breast cancer
has an added impetus to do very careful monthly breast self examinations,
have a doctor do an annual clinical breast examination (CBE), and have
a mammogram done every year if she is old enough. Some doctors may recommend the CBE and/or
the mammogram at shorter intervals than a year, at least for the first
few years, after the first incidence of breast cancer. None of this will
prevent the cancer from returning, but the earlier any cancer is detected
and dealt with, the greater a woman's chances are of surviving the cancer.
Hormones, such as estrogen, affect our body in a direct manner. It is
estrogen (or the absence of it) that plays a predominant roll in breast
development (or lack of it) during puberty. Other factors affect breast
development too, of course, and some of them may be heavily influenced
by estrogen. At several times in a woman's life, the amount
of estrogen that is available in her body is seriously altered. These are:
Young Women That Experience An Early Menarche
Menarche (men - are - key) is the term for the first menstrual flow,
which is one of several possible indications of the beginning of
puberty. The start of menstruation means that the ovaries are releasing
ova (eggs) and are sending a larger amount of estrogen into a woman's
blood stream. The average age
that a young woman experiences menarche' is currently between 11.5 and
12.3 years old. If a woman starts higher levels of estrogen production
earlier than usual, she will produce it for more years over her lifetime. Estrogen is considered the "fuel" to breast
cancer (since estrogen "fuels" the growth of breast cells, and breast
cancer is merely breast cells experiencing an uncontrolled growth), and the longer it is allowed to flow freely in the blood stream,
the greater risk a woman has of developing breast cancer.
Trials are being done to see if we can get young women to reach menarche
at later ages. That will mean less years of high lifetime estrogen
production. The concept is: Less estrogen = less breast cancer. These
trials consist of a modification of the young girls' physical training.
Eight year old girls are given a more strenuous exercise training
routine (during the Physical Education & Sports period at school) than
is usual for the other girls their age (at the same school). Body fat helps the body's
hormones develop, so the theory is that if there is less body fat, there
will be less estrogen production (less fat = less estrogen produced
= less number of years to develop breast cancer). This is similar to
why many serious, professional women athletes may have a later menarche,
or why they may even stop menstruating while they are training for completion.
What can a woman do to help avoid this risk? Start her exercise program
early (before puberty), and make sure that she gets plenty of physical
exercise every day,
Women That Experience A Late Menopause
Just like an early menarche, a late menopause will mean more years during
which a woman's ovaries produce the high levels of estrogen. That translates
to a longer duration of time over which a woman might be at an
additional risk of developing breast
cancer. Be aware that ERT, which is Estrogen Replacement Therapy is
used by women to offset (or postpone) some of the symptoms of menopause,
but it is not recommended for women that have had breast cancer, because
of the influence of medically administered estrogen on breast cancer cells.
There is nothing that a woman can do to hurry the start of menopause,
except for possibly encouraging it with a good physical exercise program.
Most women would prefer it took longer to come around. ERT is usually
used for the SYMPTOMS, and does not alter the timetable of menopause.
Please do not forget that women that are post menopausal are still subject
to breast cancer.
Women That First Experience Childbirth After Thirty (or bearing no children)
This is another situation that is related to a woman's hormones. It
has been determined that if a woman does not bear her first child before
she is 30 years old (or she bears no children) she will have a greater
risk of developing breast cancer during her lifetime. The reasoning
behind this is that a woman is not producing as much estrogen during
pregnancy and early breastfeeding. Possibly it is more of a case of
other hormones related to the pregnancy and lactation process
compensating for the estrogen levels in the body. Early terminated
pregnancies are suspected to have a causative effect on breast cancer,
because of the changes that take place in the breasts that start just
about the time the woman becomes pregnant.
What can a woman do to help avoid this risk? Obviously, bearing children
before the age of 30 will make a difference, but that is certainly no reason to bring a child
into this world.
A report of a study in Sweden supports "the hypothesis of a relationship
between the perinatal hormonal environment and the risk for breast cancer."
(1) Reuters Medical News reported this study, which showed that "The breast
cancer risk in women born before 31 weeks' gestation was 6.7 times that
of the general population."
Other than doing everything possible to carry a child full term, there
is very little that a woman could do to influence this risk factor.
Two interesting references from our friends at
suggested that there are some beneficial attributes to breastfeeding (for
both the breastfeeding mother and the female infant) that might help prevent
1. P. A. Newcomb referred to a 1994 study that was published in The
New England Journal of Medicine, where the breast cancer rates of women
that had never lactated were compared to the breast cancer rates of women
that lactated for varying lengths of time. The findings were described
in this way: "If you set the frequency of pre-menopausal breast cancer among
the women who never lactated at 1.00, then the relative risk of breast
cancer for women who had lactated was:
Lactated 3 months or less = .85
Lactated 4-12 months = .78
Lactated 13-24 months = .66
Lactated 24 + months = .78
Ref: Newcomb, P.A. et al. 1994. "Lactation and a reduced risk of pre-menopausal
breast cancer." The New England Journal of Medicine 330(2):81-87
2. In another 1994 study that was published in Epidemiology, J Freudenheim
found that for both the pre-menopausal and the post-menopausal women that
suffered from breast cancer, women that were breastfed, "even if only
for a short time, had a 25% lower risk of developing breast cancer than
women who were bottle-fed as an infant."
Ref: Freudenheim, J. et al. 1994. "Exposure to breast milk in infancy
and the risk of breast cancer." Epidemiology 5:324-331.
A 14 year Norwegian study of 25,000 women was mentioned by the good people
. They said it showed that "women who exercised
at least four hours a week were 37 percent less likely to develop breast
cancer than less active women". They mention a California study that said
"women younger than 40 who exercised 3.8 or more hours per week had half
the rate of pre-menopausal breast cancer as inactive women".
When we talked about Early menarche earlier in this article, it was
mentioned that there is a connection between body fat and the production
of estrogen. We can easily see how a woman might reduce her body fat by
exercising, and that would possibly reduce the risk of developing breast
cancer. More Exercise = Loss of Body Fat = Lower Cancer Risk.
Some experts are convinced that the movement of the body helps to move
the lymphatic fluids that are between the body cells. Lymphatic fluids
carry away toxins and cellular waste products that are suspected to be a
cause of breast cancer. Without exercise, some body parts get no
movement, which means the lymphatic flow is compromised. In the specific
example of the breasts, when do they move? We lock them down with a bra
and prevent them from moving, so the circulation of the lymphatic fluids
in the breasts is limited. Consider the relationship that the bra has
with the breasts, in that the bra restricts breast movement anytime it
is worn. "Excessive" breast movement is
a major reason for some to wear a bra. Is wearing a bra going to help
the circulation of the lymphatic system or hinder it?
This risk factor can certainly be reduced, by a woman that wants to
improve her chances of avoiding breast cancer, by starting and maintaining
an effective exercise program. She should get a medical practitioner to
work with her before she starts any exercise program. Many feel a less
restrictive bra, or limiting the wearing of a bra to less then eight
hours a day, would allow better lymphatic circulation in the breasts.
If body fat encourages excess estrogen production, less body fat would
be better. We know that a lack of exercise causes a woman to have a higher
risk for breast cancer. While some people are larger because they do not
get enough exercise for their body, most people that are heavier (for
whatever reason) are less active than they should be, due to their size.
This is another risk factor that can be reduced, if a woman can find
a way to reduce her body weight.
Some foods contain natural plant chemicals that may "fool" the body into
producing less estrogen. Some others tend to impede the formation of tumors.
Just eating foods that are healthy for us makes a lot of sense too. A
lot of research is being done in this area. Highly processed and refined
foods like sugar, grains and flour are suspect. Many products are on the
"questionable foods" list, so you may want to learn a little more about
nutrition and alter your diet.
BIRTH CONTROL PILLS
Birth control pills usually cause a woman's ovaries to function
differently then they do naturally. This is done by modifying the hormones in the
body. Breast cancer risks are increased as much as 50% for a woman that
is taking birth control pills. Once she stops taking them, and her body
hormones get back "on track", there is no increased risk.
Women that drink three ounces of alcohol (three beers, three glasses of
wine, or three shots of whiskey) a day have twice
the usual risk of developing breast cancer. In the October 2007 Good
Housekeeping magazine they report the results of a "large, recent"
Women's Health Study to show that less than "one drink a day" will
increase a woman's risk of "invasive" breast cancer by NINE PERCENT,
with two drinks a day increasing the risk by 43%, compared to those who
do not drink alcohol at all. Alcohol will travel in a woman's
blood to every part of her body. Alcohol will get into the breast milk,
which will then go into the infant. If alcohol gets into the milk, it
certainly gets into the breast cells. The question that needs to be answered
is: Does the alcohol modify the breast cells and cause them to become
malignant? Recent studies have found a definite correlation between the
use of alcohol and an increased risk of breast cancer.
It is obvious that we do have control over this risk factor.
Reduction of or the elimination of the consumption of alcohol would
lower your risk of getting breast cancer.
It has been shown that tobacco smoke does increase a woman's risk to develop
breast cancer. Studies continue to follow up on this.
Obviously, the reduction of or the elimination of the consumption of
tobacco products would lower your risk of getting breast cancer.
These refer to the many chemicals and toxins that we come into contact
with during our lives. They are in our foods, including the growth hormones
that are used by beef and poultry producers that find their way into our
body. They are applied to the plant before harvest time to keep the insects
and birds from eating the farmer's already depleted profit margin. They
are in our clothes from the dry-cleaning and the dyes, stiffeners, and
manufacturing compounds used to manufacture the clothing. Exhaust gasses
from our vehicles, gasses that escape from manufacturing processes, and
even simple degassing of chemicals from vinyl upholstery and carpets contribute
to the pool of toxins.
We do not know whether there is a direct cause/effect relationship between
these chemicals and breast cancer, but research continues to search for
If these toxins get into our body, and if they are capable of causing
breast cancer, how can we prevent them from doing their damage? We discuss
elsewhere on this site, where we discuss how that system removes these
toxins from our body. The toxins that stay in the body must be destroyed
or controlled with our immune system. We must do whatever we can to enable
these two systems to perform at their peak levels. Anything that impedes
the lymphatic system from doing its job (tight clothes or a bra?) or
impedes the immune system (illnesses,
drugs!!) will enable toxins to build to dangerous levels in our bodies.
Please remember that Risk Factors are just that: Risk Factors...
they are just numbers. If you
have a risk factor, that does not mean that you will get cancer. It is
only an indicator that you have a higher risk (higher odds; a better
chance than the person next to you) of developing
breast cancer. You may reduce your chances of getting breast cancer if
you modify or eliminate any part of your lifestyle that increases your
risks to get breast cancer. The time to do that would be today.
There is a possibility that research will find yet other risk factors
in the future. We are blessed by living during a very exciting time; a
time when new medical discoveries are being unearthed almost daily. For
any new information that may come in about Risk Factors of Breast Cancer,
Topics Of Interest.
(1) Journal of the National Cancer Institute 2000;92:840-841