Significant family history means that you have:
- One first-degree relative (mother, father, sister, brother, daughter, or son) with colon cancer diagnosed under the age of 60; or,
- Two or more first-degree relatives with colon cancer diagnosed at any age.
- Colonoscopy screening can start at whichever age is youngest between these two:
- Age 40; or,
- 10 years younger than the age of diagnosis of your youngest first-degree relative that was diagnosed with colon cancer.