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Colorectal cancer—or cancer of the colon or rectum—is second only to lung cancer as the leading cause of cancer-related deaths in the U.S. Fortunately, this type of cancer can be treated successfully if it is found early.
Anyone can get colorectal cancer, but more than nine out of 10 cases occur in adults age 50 and older. Besides age, other risk factors include:
The exact causes of colorectal cancer are not known. However, research suggests that certain lifestyle practices may lower a person’s risk of developing colon cancer. These include:
Screening offers the single best method of discovering colorectal cancer at a treatable stage. There are many screening options. Many health experts recommend that people age 50 and older undergo screening with one or more of these tests:
| Screening Test | Frequency |
| Fecal occult blood test (FOBT) | Yearly |
| Flexible sigmoidoscopy | Every five years |
| Colonoscopy | Every 10 years |
| Double-contrast barium enema | Every five to 10 years |
Each screening method or combination has pros and cons. Your doctor can help you decide which screening technique is right for you. People who face a high risk for colorectal cancer may be advised to undergo earlier and/or more frequent screening.
While colorectal cancer often causes no symptoms in its early stages, warning signs may include:
Talk to your doctor if you suffer from any of these symptoms, which may be the result of other conditions.