by News Canada
(NC)-March is National Colorectal Cancer Awareness Month, and to ensure
Canadians have the necessary information to make informed decisions and choices
about their colon health, frequently asked questions are answered below.
Colorectal cancer is the third most common cancer for both men and women in
this country, and in 2002 more than 17,000 individuals were diagnosed with the
disease. Don't wait. If you think you are at risk for colorectal cancer, talk to
your health care professional now. Early detection and treatment could save your
life or the life of a loved one.
1. What is colorectal cancer?
Colorectal cancer begins in the cells of the colon or the rectum. Both the
colon and the rectum are muscular tubes lined with glandular cells. The majority
of colorectal cancers start in the glandular cells. The colon (known as the
large bowel or intestine) joins the small intestine to the rectum. Cancer of the
small intestine is very rare, so when you hear someone talk about bowel cancer,
they usually mean colorectal cancer.
2. What causes colorectal cancer?
There is no single cause of colorectal cancer, but some factors appear to
increase the risk of developing it, including:
- Age (men and women) - particularly after 50
- Polyps - small growths on the inner wall of the colon and rectum
- Family history of colorectal cancer, benign colorectal polyps, inflammatory
bowel disease (ulcerative colitis or Crohn's disease), or breast, ovarian or
endometrial cancer
- Diet
- Obesity
- Lack of exercise
- Diabetes
- Heavy alcohol consumption
- Smoking
3. What are the symptoms of colorectal cancer?
Colorectal cancer is often referred to as the "silent killer" as there are
usually no warning signs or symptoms, especially in its early stages.
Having the following symptoms does not mean that you actually have colorectal
cancer, and in fact they could be caused by other problems. You need to talk to
your doctor to be sure.
- Blood in or on the stool (either bright red or very dark in colour)
- A persistent change in normal bowel habits such as diarrhea, constipation or
both for no apparent reason
- Frequent or constant cramps, if they last for more than a few days
- Stools that are narrower than usual
- General stomach discomfort (bloating, fullness and/or cramps)
- Frequent gas pains
- Strong or continuing need to move your bowels, but with little stool
- Feeling that the bowel does not empty completely
- Weight loss for no apparent reason
- Nausea and vomiting
- Constant tiredness
4. How is colorectal cancer diagnosed?
After completing a physical examination (including a rectal exam) and
discussing your overall health with you, your doctor may suspect colorectal
cancer. A fecal occult blood test (FOBT) may also be taken to determine if there
is blood in your stool. In addition, the FOBT test will show your doctor if
there is bleeding in your colon. Bleeding may come from polyps.
Other tests to confirm colorectal cancer include a colonoscopy, a type of
telescope that is used to examine the inside of the colon, a sigmoidoscopy, a
test used to view the inside lining of the rectum and a part of the colon, or a
barium enema which uses an x-ray to look at the colon.
5. When should you get screened for colorectal cancer?
The Canadian Cancer Society recommends that men and women 50 and older have a
fecal occult blood test at least every two years. Individuals who fall into one
of the high risk groups are those with a personal or family medical history of
colorectal cancer, benign polyps, inflammatory bowel disease or breast, ovarian
or endometiral cancer. These individuals should talk to their doctor about
earlier screening.
6. Why is screening for colorectal cancer important?
Screening tests for colorectal cancer can save lives. It is treatable and
often curable when detected early. In addition, testing will help to identify
the grade of your cancer cells and what treatment action is required.
7. What treatment options are available for colorectal cancer?
Treatment for colorectal cancer depends mostly on the size, location, and
extent of the tumor, as well as a person's overall health. Surgery to remove the
tumor and radiation is the most common treatment in the earlier stages of the
disease. Chemotherapy treatments such as Camptosar® are used in the later stages
when the cancer has spread to other areas of the body.
Other chemotherapy treatments approved in Canada to fight cancers of the
colon and rectum that have spread to other areas of the body include Xeloda® and
5-fluorouracil (5-FU).
8. Where can I get more information on colorectal cancer?
For more information about this disease, visit the Canadian Cancer Society
web site at www.cancer.ca or call toll free at 1-888-939-3333. Other resources
include the Colorectal Cancer Association of Canada web site at www.ccac-accc.ca
or The National Colorectal Cancer Campaign at www.coloncancercanada.ca.
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