Colorectal Cancer

Conditions and Treatments

In many cases, colorectal cancer develops from precancerous, or benign growth of tissues found in the colon, rectum or anus, called polyps. These polyps do not invade nearby tissue or spread to other parts of the body and can be easily removed during a procedure called a colonoscopy.

If benign polyps are not removed, they can become cancerous, or malignant over time. Therefore, detecting and removing benign polyps is the most effective way to prevent the development of colorectal cancer. Approximately 90 percent of colorectal cancers and deaths are thought to be preventable. Along with regular colorectal cancer screenings, regular exercise and maintaining a healthy weight can reduce your risk of developing colorectal cancer.

Reviewed by health care specialists at UCSF Medical Center.
Last updated July 31, 2007