When people have colonoscopies they usually only find around 2 to 5 polyps in the colon.
The average number of polyps that are removed during a colonoscopy in most people is between 1 and 2 polyps that are not cancerous.
However when the polyps are removed it prevents the colon cancer from occurring.
If you do have polyps removed during a colonoscopy then you might need to go in for a colonoscopy every 5 to 6 years instead of every 10 years.
However if no polyps are found during the colonoscopy then you usually only need to have a new colonoscopy every 10 years.
When you turn 50 years old you should have your first colonoscopy and then have a new colonoscopy every 10 years and then by the time you reach 75 years old you can usually cease and stop having colonoscopies but you can continue having colonoscopies if you want to as long as you live.