Hereditary Colorectal Cancer Algorithm

My Family Health Portrait: Cancer Edition (MFHP: Cancer)

CDC's MFHP: Cancer app helps you collect your family's history of cancer and understand your risk for breast, ovarian, and colorectal cancer. Android users can download the app from Google Play and iOS users can download the app from the App Store.

Note: The app's algorithm assesses risk based only on family health history. It does not account for other risk factors, such as age, body mass index, eating habits, physical activity, smoking, or alcohol use.

Risk factors

If you give a positive answer (yes) to any of the following 15 statements, the result is "Increased Risk."

1. You have had colon or rectal cancer.
2. You have Lynch syndrome.
3. You have had colon polyps.
4. You have familial adenomatous polyposis (FAP).
5. You have inflammatory bowel disease (ulcerative colitis or Crohn's disease).
6. You have had endometrial or uterine cancer.
7. Your relative (parent, sibling, half-sibling, child, grandparent, aunt, or uncle) has Lynch syndrome or FAP.
8. Your parent, sibling, or child has had colon or rectal cancer.
9. Your parent, sibling, or child has had colon polyps.
10. Two or more of your aunts, uncles, grandchildren, or half-siblings had colon or rectal cancer.
11. Your aunt, uncle, grandchild, or half-sibling had colon or rectal cancer before age 50.
12. Your relative had uterine cancer before age 50.
13. Two or more of your relatives had uterine cancer at any age.
14. You or your relative had a cancer related to Lynch syndrome (colorectal, endometrial, uterine, gastric, ovarian, pancreatic, kidney, or brain) before age 50.
15. Two or more of your relatives had a cancer related to Lynch syndrome at any age.

"What to do next"

All results include the text: "Learn more about hereditary colorectal (colon) cancer" and "Learn about genetic testing and counseling."

If your answer to statement 1 is yes and your answer to statement 2 is no

The result includes the following text:

Talk with your healthcare provider about

• Your risk and family history of cancer
• Appropriate follow-up care and screening
• If Lynch syndrome screening is appropriate

Share this information with your family members

If your answer to statement 2 is yes

The result includes the following text:

Talk with your healthcare provider about

• Your risk and family history of cancer
• Appropriate follow-up care and screening

Share this information with your family members

If your answers to statements 1 and 2 are no and your answers to any of statements 3 to 15 are yes

The result includes the following text:

Talk with your healthcare provider about

• Your risk and family history of cancer
• If Lynch syndrome screening is appropriate

Share this information with your family members

If all of your answers are no

The result includes the following text:

Discuss appropriate screening options with your healthcare provider

Be sure to update your family history with any new cancer diagnoses

Data sources

This algorithm is based on information from:

• Genetic/Familial High-Risk Assessment: Colorectal (National Comprehensive Cancer Network)
• Colorectal Cancer: Screening (U.S. Preventive Services Task Force)