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Breast
Cancer (Invasive) Stage 3 |
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Stage 3 breast
cancer
If your cancer
is a Stage 3, it means that the tumor in your
breast is a bit larger than most, and/or there
is disease seen in the lymph nodes under the arm
(in the axilla). There is no evidence of
disease spread to organs beyond the breast and
the lymph nodes. Using the
TNM staging, the
possible combinations within stage 3 are
-
Stage IIIA:
T0 to T2, N2, M0 / T3, N1 or N2, M0
-
Stage IIIB:
T4, N0 to N2, M0
-
Stage IIIC:
any T, N3, M0
Your doctors
use their best estimate about the tumor size and
the presence of cancer in lymph nodes or
elsewhere to come up with the “clinical” stage,
in order to make appropriate treatment plans
prior to the surgery. Once the surgery has been
done, these estimates are refined, based on
actually looking at these tissues under the
microscope. So the clinically estimated stage
may change based on the “pathologic” findings.
You can learn more about staging breast cancer
by following
this link to our
“Staging” page.
Surgery plays
an important role in Stage 3 breast cancer, but
chemotherapy is equally, if not more important.
With these more advanced cancers, the order of
treatment more often begins with chemotherapy.
For this group of women, there is no consensus
among physicians about using chemotherapy first
or surgery first. The DeKalb Surgical doctors
typically support the use of chemotherapy before
surgery. This method allows us to see that in
your individual case, the selected chemotherapy
is effective in shrinking the tumor down in
size. Not only does this let us know with
certainty that your cancer is not resistant to
the selected treatment, the shrinking tumor
makes it easier to surgically remove it with
clear margins later on. In some cases, we even
may see that the chemotherapy is so effective,
that when the surgery is done, ALL the remaining
cancer has disappeared. These patients have
a particularly good prognosis.
At DeKalb
Surgical, for Stage 3 cancers, many patients are
offered a Roundtable Consultation as soon as the
diagnosis of cancer is made.
At this unique meeting, a multidisciplinary team
of doctors and our nurse navigator will all meet
together with you simultaneously, in order to
come to a unified treatment plan, customized to
your specific situation, to offer you the
greatest likelihood of a cure. Since we have
developed a variety of effective weapons for
breast cancer, including surgery, radiation
therapy, hormonal treatments, and chemotherapy,
we want the doctors who specialize in each of
the treatment modalities to meet and work
together to recommend the best sequence of
treatments. We don’t have to use all of
these modalities in every case, but it is best
to decide up front, what the best plan would be,
and in which order, with input from the entire
team, including you, the patient.
Chemotherapy is
a standard part of treatment for most women with
Stage 3 breast cancer, although the decision
for chemotherapy is based on several different
factors. Your age and general health,
including any other major medical problems must
be considered. The characteristics
specific to your cancer may indicate that
chemotherapy won't have much impact. Each
woman brings her own priorities and concerns
regarding chemotherapy, and these are of course
considered by your doctors. There are a
number of ways to try to predict your risk for
recurrence, and depending on how high or low
that risk is, each individual woman may make
their own choice.
The choice of
chemotherapy is dependent on a number of
factors. We can now test your cancer to see in
advance if it will be sensitive to certain types
of chemotherapy, so it is critical to do these
tests before deciding on which specific drugs to
use. Whatever drugs are recommended, they are
typically given in “cycles”. A “cycle” is
typically a two or three week interval.
Carefully calculated doses of the selected drugs
are given at the beginning of the cycle, and you
are monitored for side effects as the drugs work
on the cancer. The drugs also affect normally
dividing cells in your body, and this is the
source of the potential side effects. The cells
in the body that are dividing the most include
blood cells in the bone marrow, hair cells, and
the cells lining the digestive tract, from the
mouth all the way through the rectum. Knowing
this, it is no surprise that the side effects
include anemia, and other changes in the blood,
like lowered white blood cell count, hair loss,
and nausea and vomiting. Fortunately,
oncologists are good at preventing or at least
managing these potential side effects in most
cases. Prior to initiating the treatments, your
oncologist will no doubt discuss the potential
side effects with you, and any alternative
regimens that might be used. The various
chemotherapy drugs have different potential side
effects, so you should discuss these issues with
them prior to your starting your treatment.
One routine
assay done on breast cancers is called the HER2
assay. We have learned that when this gene is
“overexpressed” in a cancer, it is more likely
to act aggressively, by spreading to other
organs. But we have also discovered a drug,
which was specifically designed to block this
protein’s function is very effective in
decreasing the aggressiveness of these cancers.
Only about 15% of breast cancers have this
genetic dysfunction, but if your cancer is “HER2
positive”, you likely will be advised to receive
this specific chemotherapy, called Herceptin, in
addition to some other drugs. The Herceptin is
usually given in cycles over the entire first
year following the initial treatment.
Whether surgery
is done before or after chemotherapy, breast
conservation is typically very desirable. The
surgery for breast conservation is usually
called “lumpectomy and axillary dissection”, or
“partial mastectomy and axillary dissection”,
and almost always requires radiation therapy
afterward. In Stage 3 breast cancer, mastectomy
may be recommended instead. This may be
necessary if the cancer is very large, if there
is more than one place in the breast where
cancer is present, if the cancer in the breast
has involved the overlying skin, or if this is a
second cancer in the breast. There are other
scenarios where mastectomy may be a preferred
choice, for instance, if it is the woman’s
preference, if there has previously been cancer
in the opposite breast, if a genetic test called
BRCA is positive, or if there is some reason
that radiation therapy cannot be given.
In addition to
the lumpectomy or mastectomy, the lymph nodes
under the arm will be removed, or in some cases,
just sampled. In Stage 3, most patients will
already be known to have some cancer cells in at
least one or more of the lymph nodes. If it is
already known that there is some involvement of
some lymph nodes, it is almost always
appropriate to remove all of the fatty tissue
under the arm (the axilla) where the lymph nodes
are found. This tissue is sent to the pathology
department and then placed formaldehyde, which
“fixes” or “preserves” the tissue, to keep it
from decaying. The tissue is then dissected to
find out how many lymph nodes are contained in
it, and how many of the lymph nodes have
cancer. This information is then used to update
the staging of the cancer.
Radiation
therapy is virtually always used after
lumpectomy, to decrease the likelihood of
recurrence of cancer in the breast. And in
Stage 3 cancers, even after mastectomy,
radiation therapy may be recommended for
treatment of the chest wall. The radiation
therapy is given as small doses on a daily
basis, 5 days a week for about 6 weeks.
You may have heard about a radiation therapy
treatment given over just one week, and this is
discussed elsewhere in this website, but it is
not a good option for women with Stage 3
cancer.
If you do have
a mastectomy, in most cases, a breast
reconstruction is an option. In many cases this
can be done immediately. In other words, you
have your surgery for the mastectomy, and you
wake up afterward with the reconstructed
breast. Not all women choose to undergo breast
reconstruction, or may choose to delay the
reconstruction until a later date. The
discussion about what is best for you can get a
bit complicated, and is best done with your
surgeon and plastic surgeon. There are many
options available these days, including the use
of some tissue from other adjacent parts of your
body, silastic or saline implants, or a
combination of these. A common reconstruction
method is to use fatty tissue and muscle tissue
from the abdominal wall, which is rotated upward
to replace the breast mound. Surgeons may leave
the skin “envelope” of your breast (a
“skin-sparing mastectomy”), and then re-fill the
skin with the transferred tissue or with an
implant. This method seems to give better
cosmetic results in general.
It is important
to know that if radiation therapy is necessary,
it can affect the cosmetic results of a
reconstruction, so if you are going to need
radiation even after a mastectomy, your doctors
should discuss the possible added risks.
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