It's March. And that means it's the national month for Brain Injury Awareness, Endometriosis Awareness, Nutrition Awareness, Eye Health and Safety Awareness, Multiple Sclerosis Awareness, Sleep Awareness, Problem Gambling Awareness and my favorite, for the purposes of The Cancer Blog -- Colorectal Cancer Awareness.

Colorectal cancer -- cancer of the colon or rectum -- is a disease that affects both men and women and is preventable nearly 90 percent of the time.

Starting at age 50, men at women at average risk for the disease should get screened. Those with increased risk, like African-Americans who typically develop colorectal cancer at younger ages, should be screened even earlier.

Screening -- by way of fecal occult blood test (FOBT), flexible sigmoidoscopy, and colonoscopy -- is critical because colorectal cancer often occurs with no symptoms. Symptoms do sometimes present themselves in the later stages of the disease and include rectal bleeding, bright red blood in or on the stool, change in bowel habits, stools that are narrower than usual, general stomach discomfort, diarrhea, constipation, frequent gas pains, unexplained weight loss, constant fatigue, and vomiting. Persistence of any of these symptoms for more than two weeks warrant an immediate visit with a health professional.

Treatment for this disease, which strikes about 153,000 people and causes about 52,000 deaths each year, includes surgery, radiation, and chemotherapy.

In the spirit of this National Colorectal Awareness Month, experts recommend remembering these important points:

• Colorectal cancer can be prevented.
• Screening for the disease can identify polyps -- grape-sized growths in the colon and/or rectum -- that can be removed to prevent cancer from developing.
• The magic age for screening is 50 -- unless you have an increased risk for the disease.
• Colorectal cancer is treatable.
• Regardless of your age, know the risk factors, know the symptoms, and know your family history.
• Talk with your health professional about colorectal cancer and your own risk for the disease.

Colorectal cancer screening prevents more deaths due to early detection than breast or prostate cancer screening. The University of Michigan Comprehensive Cancer Center recently published a report on the 12 myths about colon cancer and getting to know them could save your life and the lives of your family and friends. Colon cancer is the second leading cause of cancer death in the United States, and the number one cause of cancer death among non-smokers.

Symptoms of colon cancer can include severe abdominal pain, blood in the stool or rectal bleeding, unexplained loss of weight, or major changes in bowel habits (recurrent constipation or diarrhea). But, these symptoms often do not occur until the cancer is in its more advanced stages. An absence of symptoms does not mean an absence of cancer. In fact colon cancer is often referred to as a "silent killer" because of the lack of symptoms until it is in advanced stages. A colonoscopy is the only method that can actually help prevent you from developing colon cancer in the future because during the screening colonoscopy, if the doctor finds polyps, they can remove them from your colon as part of the procedure, preventing the polyps from ever having the chance to develop into cancer. If the polyps found in your colon happen to already be cancerous, they can often be removed during your colonoscopy and treatment can begin right away.

When colon cancer is caught early, it has a 95 percent survival rate. That's why screening is so important. Once colon cancer has spread to the liver, it's usually deadly, with only a 9 percent survival rate. Colonoscopy screening is recommended for men and women beginning at age 50, unless other risk factors exist such as family history, obesity, smoking, ulcerative colitis or Crohn's disease.

The earlier a cancer is detected, the greater the chances for cancer survival. One of the problems in surviving colon cancer is that people are reluctant to undergo colonoscopies, and therefore, colon cancer is not always detected in its earliest stages before symptoms develop.

Mount Sinai School of Medicine and EXACT Sciences Corporation are publishing study findings that show a DNA stool test can accurately predict colorectal cancer 88 percent of the time, regardless of where in the colon the cancer is located.

"This study confirms that stool-based DNA technologies can achieve high sensitivities for detecting colorectal cancer," stated Steven Itzkowitz, M.D., principal investigator and Professor and Associate Director of Gastroenterology at Mount Sinai School of Medicine. "For those individuals who are unwilling or unable to undergo colonoscopy, stool DNA testing offers a valuable and patient-friendly screening option. These results also underscore that as new markers and technologies are developed and validated, they can readily be incorporated into existing stool DNA tests to improve cancer detection and, ultimately, patient outcomes."

According to statistics, colorectal cancer is the second leading cause of cancer deaths in the U.S. and more than half of the over 80 million people over the age of 50 have never been screened. I agree with the researchers who suggest that it is time to develop new non-invasive technologies for colorectal screening.

Coletta Barrett believed her stomach pains were caused by a gall bladder attack after eating greasy fried food. She excused a tightening in her lower abdomen as irritable bowel syndrome, and she explained blood in her stool as a response to stress. Only after a referral to a gastroenterologist led to a colonoscopy did she learn that the upper portion of her colon was almost completely blocked by a large tumor -- a cancerous tumor. Barrett was diagnosed with colon cancer. Her colonoscopy saved her life.

Barrett never once predicted she might have colon cancer. She thought the disease mostly struck older people. She was just 42. Screening tests are not even recommended until the age of 50. She had no family history of this cancer and had no typical risk factors associated with the disease. She did not smoke, was not overweight, and drank very little. But she did in fact have colon cancer -- shocking as it was -- and doctors believed her tumor had been growing for 18 months before detected. Fortunately, Barrett learned that her cancer had not spread. And she learned a few other things that she now shares as advice -- from her survivor point of view. These tips come from an article about Barrett in the August 1 Women's Day magazine.

• Barrett says, "know your body." And don't ignore or dismiss any changes that occur.
• Don't let embarrassment stop you from seeking help. Some symptoms can be difficult to discuss -- such as change in size and frequency of bowel movements, bloody stool, cramping, and bloating -- but still ask your doctor about them. Early detection is critical, she says.
• If diagnosed with colon cancer, learn as much as you can about the disease -- a well-informed patient has a better chance at a better outcome.

Barrett offers sound advice. And I think it is global advice. Knowing your body, discussing symptoms, and education after diagnosis are key for anyone. For everyone.