Having inflammatory intestinal disease like Crohn's disease, greatly increases the risk for colon polyps and colon cancer.
That's why you got the polyps earlier that the usual years after 50.
There is a 25 to 30 percent chance that polyps will be present on a repeat colonoscopy done three years after the initial polypectomy (polyp removal).
According to the size and appearance of the polyp, the doctor can suspect it as a one that have a potential to get cancerous.
It takes approximately 10 years for a small polyp to develop into cancer.
You'll need to have regular colonoscopy examinations and to try to avoid eating food high in fat and food low in fiber, smoking and sedentary life style!