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Colorectal Cancer
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Colorectal
cancer is a term that is used to describe both colon
cancer and rectal
cancer. While there are differences
between the two types of
cancer (mostly in treatment
options), the two cancers share many things in common.
Both cancers begin in the digestive system, responsible
for processing eaten food. The colon and the rectum make
up approximately the last 6 inches of the digestive
system, after the small and large intestines.
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Colorectal
cancer, then, begins in the colorectal tissue
that makes up the walls of the colon and the rectum. The
abnormal cell growths begin in the inner layer of tissue
and can potentially grow into the surrounding layers of
tissue.Depending on how far the
cancer has spread, the
cancer
will grow. Most colorectal cancers begin as a polyp and
develop relatively slowly compared to other cancers.
The overwhelming majority of colorectal
cancers are classified as adenocarcinomas, or cancers
that begin in the cells that line the colon and rectum.
However, there are many other types of colorectal
cancer, each of which are very rare. |
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Causes of Colorectal Cancer:
Colorectal
cancer is caused by polyps, or tissue that is
over grown anywhere in the lining of the colon. These
polyps can grow due to many different reasons. Some of
the causes can be controlled, such as one's diet,
lifestyle and whether or not the patient smokes
cigarettes. However, the patient does not have control
over other symptoms, such as their age, race, personal
and family medical history, and whether or not they
suffer from diabetes or obesity. |
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Prevention from Colorectal Cancer:
The best prevention techniques of
colorectal
cancer, also known as colon
cancer, have been
debated for years. While most health care providers
agree that a healthy diet and lifestyle are the best
ways to prevent the disease, doctors have always
disagreed about the affects of supplements, like calcium
and aspirin. Many studies have been conducted through
out the years to test if these and other supplements
actually can prevent colon
cancer at all. While most of
the methods used to help prevent colorectal
cancer
pertain to dietary changes, there are alternative ways
to aid prevention of the disease as well. Many
colorectal
cancer specialists recommend those at risk to
sit for long periods of time. Sitting, or sedentary
activities can make it easier for polyps to grow. It is
not suggested that one should always avoid sitting, but
studies have suggested that those who have sedentary
jobs or who spend lots of time sitting, have a higher
risk for colorectal
cancer. These methods can help one
achieve negative results from colorectal
cancer
screening. Colorectal
cancer is most common in males,
age forty to fifty years old. However, no one is immune
to the disease and everyone should practice as many
suggested methods of colorectal
cancer prevention as
possible. |
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Symptoms
Of Colorectal Cancer:
As with most cancers,
symptoms are not produced until the
cancer advances to later stages of the
disease. Symptoms of colorectal
cancer
can range from a typical fever and
excessive tiredness, to blood in the
patient's stool, irregular bowel
movements and other types of abdominal
problems. Common symptoms of colon
cancer include various changes in bowel
movements, such as persistent
constipation or diarrhea, the feeling of
not being able to empty the bowel
completely, an urgency to move the
bowels, rectal cramping, or rectal
bleeding. You should see your health
care provider if you experience any of
the common warning signs, such as blood
in the stool, as well as long or thin
stools. Also if you feel unexplained
fatigue, loss of appetite or loss of
weight. |
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Screening
Of Colorectal Cancer:
Since colon
cancer does
not produce symptoms during the early
stages, it is recommended that all men,
age fifty and older, go for routine
colorectal
cancer screening tests. These
various tests can detect the disease
before symptoms are noticed. The most
common methods of colorectal
cancer
screening are the sigmoidoscopy and the
fecal occult blood test. A sigmoidoscopy
is a test that uses advanced technology
in order to detect
infections or
abnormal growths in the colon.
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The advantage of
sigmoidoscopy is that it can detect
colorectal
cancer much better than some
other methods of colorectal
cancer
screening. However, sigmoidoscopy can
not detect abnormalities in the upper
colon, which a regular colonoscopy can
do. The fecal occult blood test is
commonly used for screening of
colorectal
cancer, however, it is not
used as the primary test for detecting
the disease. The fecal occult blood test
is conducted by taking a stool sample
from the patient and placing it on a
special medicated pad. Next, a specific
chemical compound is inserted at the top
of the fecal sample. If the stool sample
turns blue, then that indicates that
there is blood present in the patient's
stool. A positive result from the fecal
occult blood test, means there is reason
for further testing, as blood in the
stool could indicate colon
cancer or
other various
infections or diseases.
Further testing is almost always
suggested after a positive result in
this test. |
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Colorectal Cancer Diagnosis:
There are multiple ways
to detect, or diagnose colon
cancer,
such as the colonoscopy and virtual
colonoscopy examinations. The ladder
being more comfortable for the patient,
but the regular colonoscopy has been
proven to be much more accurate. Both
exams require certain preparations from
the patient before the exams take place.
The patient must only drink clear
liquids during the forty eight hours
prior to the exam and must not eat any
solid foods twenty four hours before the
exam. Certain liquid or pill form drugs
might be given to the patient in order
to maintain a completely clean and clear
colon. |
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Colorectal Cancer Prognosis and Staging:
Prognosis:
The prognosis for colorectal
cancer can vary from patient to patient based on
what actually caused the disease. Like many
other cancers, the earlier the disease is
detected, the better the chances are of survival
for the patient. Aside from when the disease is
detected there are other factors that can affect
the prognosis. These factors include the
patient's overall medical health as well as
whether or not there is a family history of the
disease. While these factors are important, the
stage at which the
cancer is detected has the
biggest influence on the survival rate. |
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Staging:
Staging for colon
cancer is similar to most
other cancers. Specialists use the common TNM
system to determine how advanced the disease is
in the patient. This staging process includes
four stages. Each stage is limited to different
ranks of each letter (T,N and M). The "T", which
stands for tumor, is used to determine how large
or small the actual tumor is, and whether or not
it has grown large enough to penetrate
surrounding tissue. The "N", which stands for
node (as in lymph node), is used to determine
how many local lymph nodes are affected by the
tumor. Finally the "M", which stands for
metastasis, is used to determine whether or not
the
cancer has grown from it's origin to other
organs of the
body. |
Treatments Of Colorectal Cancer:
Colorectal
cancer
treatment methods vary depending on when
the disease is detected. If the
cancer
is found during the early stages and is
small enough, the doctor will most
likely remove it through surgery. Up
until about thirty years ago, colon
cancer surgery was conducted by the
surgeon making one long incision and
removing the
cancer through the one
incision. This resulted in a long and
very painful recovery. However,
advancements in medical technology lead
health care providers to discover a more
productive method to remove colorectal
cancer. Laparoscopic surgery indicates
surgery with a laparoscope. Instead of
one long incision, in laparoscopic
surgery, the surgeon makes up to six
small incisions in order to remove the
tumor. The several smaller incisions
result in a much quicker and less
painful recovery process as opposed to
the recovery from the one long incision.
The laparoscope is a small unique camera
which allows the surgeon to see inside
the colon, making it easier to remove
both the tumor and both sides of the
colon that are infected. The two sides
of the colon are stitched back into the
colon once the tumor is removed.
Colorectal
cancer chemotherapy is
usually used as a last resort option of
treatment for colorectal
cancer.
Chemotherapy refers to drugs that help
eliminate
cancer cells. The decision to
use chemotherapy as treatment for
colorectal
cancer is usually made after
the
cancer has grown to the point where
it can not be surgically removed. |
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Colorectal Cancer Statistics:
Colorectal
cancer is
ranked as the second leading cause of
death (from
cancer) in the United
States. Although the number of
individuals diagnosed with colorectal
cancer each year remains the same;
colorectal
cancer related deaths have
significantly decreased. This success
can be attributed to the constant
awareness and funds raised in support of
treatment and research for the disease.
According to American
Cancer Society,
last year, an estimated 148,000
individuals were diagnosed with
colorectal
cancer, and over 55,000 men
and women died from the disease. For any
individual diagnosed with colorectal
cancer, the five-year survival rate is
64.1 percent. The survival rate has
risen over the past few years, due to
the fact that over 40 percent of
colorectal
cancer is caught within the
confined primary site. |
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Colorectal Cancer Research:
Recent research in
colorectal
cancer deals mainly with
alternative methods of screening,
prevention and as with research for most
cancers, an ultimate cure for the
disease. Recent clinical trials for
colon
cancer have tested various vitamin
supplements affects on the disease. Some
studies have suggested that people who
regularly use multi-vitamins that
include a source folate, as well as
vitamin D and calcium, have a reduced
risk for colorectal
cancer. Since these
studies are new, there are many tests
currently being conducted to either back
up or disprove these claims. |
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