Uterine
cancer is a cancer that starts in the inner lining of a woman's uterus. The
uterus is also called a womb or an endometrium. Uterine cancer usually develops
in women who are post menopausal. It is unknown what exactly causes uterine
cancer. Some known risk factors for uterine cancer include never having been
pregnant, obesity, having started menstruating before age 12, and using
estrogen therapy. Women suffering from uterine cancer experience symptoms such
as heavy and prolonged periods, bleeding not related to periods, and post
menopausal bleeding.
Treatment comes in the form of surgery and radiation. Many women with uterine
cancer will require their uterus to be removed in a procedure called a
hysterectomy. Radiation treatment follows to kill all remaining cancer cells in
the body. Uterine cancers that have the chance to metastasize may not be
successfully treated through surgery and radiation. Over 7,000 women in the
United States will die as a result of uterine cancer throughout the year. All
women who have entered menopause should begin to monitor themselves more
closely and schedule doctors visits regularly to prevent a uterine cancer
diagnosis or poor prognosis.
Causes of Uterine Cancer
Researchers have not named a direct cause of uterine cancer but some risk
factors have been declared. The female body must maintain a proper level of
estrogen and progesterone hormones. If the menstrual cycle for some reason
produces too much estrogen, there is a stronger change of developing uterine
cancer. Estrogen therapy is sometimes taken by women who are experiencing
symptoms of menopause such as hot flashes and vaginal dryness. Estrogen therapy
puts more estrogen in the body, a risk factor for uterine cancer. Family
history plays a role in uterine cancer. Those with uterine cancer in the family
are at a higher risk of developing the disease. Also, women who have had some
type of radiation therapy already performed on their pelvic region have damaged
cells in that area that could lead to uterine cancer.
Uterine Cancer Prevention
Uterine cancer in most cases cannot be prevented. One thing women can do to
reduce their risk of getting uterine cancer that will help their body's out in
other ways as well is exercising regularly and staying in shape. This keeps a
woman's estrogen and progesterone levels balanced. Birth control pills are a
good way of controlling estrogen and progesterone levels and the effects can
decrease a woman's chances of developing uterine cancer up to ten years after
discontinuation of usage. Being pregnant is also a good way to reduce the risks
of developing uterine cancer. Women should visit their gynecologists to check
for any possible sign of uterine cancer so the disease can be caught in it's
earliest stage and treated.
Types of Uterine Cancer
Uterine cancer is made up of different types of tumors. Two main tumors are
endometrial stromal sarcoma and uterine leiomyosarcomas. Other types of uterine
tumors include mixed mullerian, mullerian adenosarcoma and cancer that reached
the uterus but do not originate there. These cancers usually grow in the glands
of the lining in the uterus. While sharing similar symptoms, they range in size
and effect on the patient. These tumors can successfully be removed but they
carry a strong probability of recurring within a few years.
·
Make
up for 1% of all female reproductive system cancers
·
Do
not develop in uterus' glands
·
Breast
cancer prevention drug tamoxifen known to raise estrogen levels and cause these
tumors.
·
May
set develop just before menopause.
·
Can
be successfully treated through surgery and menopause.
·
Develop
in smooth tissue lining of uterus.
·
Malignant.
·
Effects
1 out of 100,000 women each year.
·
May
cause vaginal bleeding and foul odor.
·
May
require a hysterectomy.
·
Likely
to recur in former patients.
Uterine Cancer Symptoms
Uterine cancer symptoms usually occur after menopause but it is possible to
occur before it. The most common symptom experienced by women with any type of
uterine cancer is vaginal bleeding. There are varying degrees of vaginal
bleeding. There can be light "spots" that appear or the bleeding can
be extremely heavy and problematic. Since most women with uterine cancer are
post-menopausal, the vaginal bleeding can easily be differentiated from a
menstrual cycle. A foul-smelling vaginal discharge may accompany the vaginal
bleeding. Some women wrongfully believe that the vaginal bleeding is a normal
part of menopause. This is a reason some women do not consult their doctor as
soon as they should.
Some women may experience pain while urinating or during sexual intercourse.
Many uterine cancer symptoms may not be present until later stages of uterine
cancer. Less common symptoms include fever, fatigue and weight loss. Women
experiencing any symptoms that could possibly be uterine cancer should seek a
medical professional immediately.
Uterine Cancer Screening
Women should receive uterine cancer screenings despite a lack of symptoms just
to be safe. Screenings are a good precautionary measure. Pap tests are often
given as a form of uterine cancer screening but they should not be heavily
relied upon. Pap tests usually will not show any abnormal signs of uterine
cancer until the cancer has advanced to the mouth of the cervix, close to
entering the vagina. During a pap test, cells are collected and examined. If
the cells show uterine cancer cells the cancer is likely already in an advanced
state. In rare cases where the results of a pap test lead to a biopsy, uterine
cancer could possibly be caught in an early stage. Many women are not concerned
with receiving a uterine cancer screening because the disease is quite rare.
Uterine Cancer Diagnosis
It is important to diagnose uterine cancer as early as possible. Early
detection allows for the simplest treatment options and the best prognosis. All
women who begin menopause should have uterine screenings and either a biopsy,
image test or blood test just to be sure they are in good health. There are
tests that allow doctors to examine tissues, blood and inside patient's bodies.
Examining Tissue
·
Endometrial Biopsy- A vacuum-like tube is inserted in a
patient's vagina and sucks pieces of endometrium out. These pieces of tissue
can be examined during a biopsy.
·
Hysteroscopy- A hysteroscopy is characterized by a small
telescope that is inserted through the cervix. The uterus is filled with salt
water which lets the doctor more easily see and remove anything out of the
ordinary such as signs of cancer signs or a polyp. Some medicine to numb the
area is required before the procedure.
·
Dilation and Curettage- Dilation and curettage is a
procedure in which the cervix is dilated and a special tool is used to scrape
tissue from inside the uterus. It is performed if other biopsy tests failed to
gather enough tissue to make a sure diagnosis.
Imaging tests
·
Ultrasounds- Ultrasounds checking for uterine cancer are
characterized by the insertion of a special probe in the vagina. The probe lets
off sound waves. The sound waves bounce off the tissue inside the uterus and
may create an image of a tumor. The image created could also indicate if the
cancer has grown into the outer muscle layer of the uterus.
·
Cystoscopy and Proctocsopy- A lit up tube enters either the
bladder or rectum and the doctor can remove pieces of tissue to be examined and
checked for cancer cells.
·
CT Scans- CT scans are rarely used to diagnose
uterine cancer but they are sufficient for checking to see if the cancer has
spread to other organs.
·
Chest X-ray- Chest x-rays check if the cancer has
metastasized and spread to the lungs.
Blood Tests
·
Complete Blood Test- Blood tests can check for a reduced
number of red blood cells. Women who have lost blood from the uterus (vaginal
bleeding is a symptom of uterine cancer) may have a low number of red blood
cells. This is known as anemia.
·
CA 125 Blood Test- CA 125 is a substance that many
endometrium and ovarian cancers release into the blood stream. CA 125 in the
blood can be monitored to diagnose if a patient has uterine cancer, test how
the patient is responding to treatment and determine if the cancer is
reemerging.
Uterine Cancer Staging
Uterine cancer staging is used to determine how advanced the cancer has become.
Survival rates decrease and treatment becomes more complicated as uterine
cancer levels advance. The staging system is based on the model set in place by
the American Joint Committee on Cancer, named the TNM system. The letters stand
for tumor (T), lymph nodes (N) and metastasis (M). Each letter is given a grade
next to it. A combination of grades for each letter make up specific stages.
Uterine cancer has five main stages (0-4), some of them with multiple
sub-stages for other possibilities. The current stage the cancer is in will
give doctors a good idea of how to treat the patient as well as determine a
prognosis.
Uterine Cancer Prognosis
A uterine cancer prognosis depends on what type of tumor a patient has along
with their past medical history and what stage the cancer is in. Prognoses are
often based on a patient's chances of surviving five years past the original
uterine cancer diagnosis.
Five-year survival rates are used to determine the likelihood a patient will
survive based on the stage of the malignant tumor in their body.
Malignant endometrium tumors have the following survival rates:
|
Current
Stage |
5-Year
Survival Rate |
|
0 |
90% |
|
1a |
88% |
|
1b |
75% |
|
2 |
69% |
|
3a |
58% |
|
3b |
50% |
|
3c |
47% |
|
4a |
17% |
|
4b |
15% |
Malignant Sarcomas have the following survival rates:
|
Current
Stage |
5-Year
Survival Rate |
|
1 |
70% |
|
2 |
45% |
|
3 |
30% |
|
4 |
15% |
Uterine Cancer Treatment
Uterine cancer is mainly treated through surgery and radiation therapy. Surgery
for uterine cancer is characterized by the removal of the uterus and cervix.
This procedure is known as a hysterectomy. The weeks following a hysterectomy
will be spent receiving radiation therapy almost on a daily basis. Radiation
therapy can be applied either externally or internally. Radiation therapy is
relied upon for killing cancer cells that remained in the body after surgery.
Surgery
Surgery to treat uterine cancer is characterized by the removal of the uterus
and cervix in a procedure known as a hysterectomy. If the uterus and cervix are
removed through an incision across the belly, the procedure is called a total
abdominal hysterectomy. When the organs are removed through the vagina, the
process is called a vaginal hysterectomy. In cases where the fallopian tubes
and ovaries are removed, the patient will enter menopause. The lymph nodes may
also be removed during surgery. Lymph nodes may be removed during laparoscopic
surgery. Laparoscopic surgery requires small incisions in the abdomen and a
small camera attached to the doctors tools. The recovery time for a laparoscopy
is faster than total abdominal surgery.
Radiation Therapy
Radiation therapy is used to kill cancer cells that remained in the body
following surgery. Radiation therapy can be applied externally like and x-ray
or internally with the use of small radioactive pellets. External radiation
therapy is given five days a week for four to six weeks. The actual treatment
session is only about thirty minutes.
There is less negative effect on other nearby organs such as the bladder and
rectum during brachytherapy because the therapy is more directly aimed at one
area. Brachytherapy usually beings about four weeks after surgery to remove
cancerous tumors and cells. Some people will require daily or more than one
treatment a week for the first few treatments.
Uterine Cancer Statistics
In 2009, 41,200 women will be diagnosed with uterine cancer. About 7,350 women
die in an average year from uterine cancer in the United States.
The percentage of women diagnosed with uterine cancer by age:
|
Age at
Diagnosis |
Percentage
Diagnosed |
|
Under 20 |
0.0% |
|
|