- What is cancer?
- What is colorectal cancer?
- What are the key statistics about colorectal cancer?
- What are the risk factors for colorectal cancer?
- Do we know what causes colorectal cancer?
- Can colorectal cancer be prevented?
- Can colorectal polyps and cancer be found early?
- Signs and symptoms of colorectal cancer
- How is colorectal cancer diagnosed?
- How is colorectal cancer staged?
- What are the survival rates for colorectal cancer by stage?
- How is colorectal cancer treated?
- Surgery for colon cancer
- Surgery for rectal cancer
- Ablation and embolization to treat colorectal cancer
- Radiation therapy for colorectal cancer
- Chemotherapy for colorectal cancer
- Targeted therapies for colorectal cancer
- Clinical trials for colorectal cancer
- Complementary and alternative therapies for colorectal cancer
- Treatment of colon cancer by stage
- Treatment of rectal cancer by stage
- More treatment information about colorectal cancer
- What should you ask your doctor about colorectal cancer?
- What happens after treatment for colorectal cancer?
- Can I get another cancer after having colorectal cancer?
- Lifestyle changes after treatment of colorectal cancer
- How does having colorectal cancer affect your emotional health?
- If treatment for colorectal cancer stops working
- What`s new in colorectal cancer research and treatment?
- Additional resources for colorectal cancer
- References: Colorectal cancer detailed guide
Can colorectal polyps and cancer be found early?
Regular screening can often find colorectal cancer early, when it is most likely to be curable. In many people, screening can also prevent colorectal cancer altogether. This is because some polyps, or growths, can be found and removed before they have the chance to turn into cancer.
Tests used to screen for colorectal cancer include:
- Guaiac-based fecal occult blood test (gFOBT) and fecal immunochemical test (FIT): Samples of stool (feces) are checked for blood, which might be a sign of a polyp or cancer.
- Stool DNA test: A sample of stool is checked for certain abnormal sections of DNA (genetic material) from cancer or polyp cells.
- Sigmoidoscopy: A flexible, lighted tube is put into the rectum and lower colon to check for polyps and cancer.
- Colonoscopy: A longer, flexible tube is used to look at the entire colon and rectum.
- Double contrast barium enema: This is an x-ray test of the colon and rectum.
- CT colonography (virtual colonoscopy): This is a type of CT scan of the colon and rectum.
gFOBT, FIT, and stool DNA testing mainly find cancer, but can find some polyps.
Sigmoidoscopy, colonoscopy, double contrast barium enema, and CT colonography are good at finding cancer and polyps. Polyps found before they become cancer can be removed, so these tests may prevent colorectal cancer. This is why these tests are preferred if they are available and you are willing to have them.
More information about these tests and their use in finding colorectal cancer early can be found in our document Colorectal Cancer Prevention and Early Detection.
Last Medical Review: 10/15/2014
Last Revised: 02/27/2015