© 2005-2012 American Society of Clinical Oncology (ASCO). All rights reserved worldwide.
A risk factor is anything that increases a person’s chance of developing cancer. Although risk factors often influence the development of cancer, most do not directly cause cancer. Some people with several risk factors never develop cancer, while others with no known risk factors do. However, knowing your risk factors and talking about them with your doctor can help you make more informed lifestyle and health care choices.
The following factors may raise a person’s risk of small bowel cancer:
Diet. Eating high-fat foods may raise the risk of small bowel cancer. Regularly consuming smoked or cured foods may also increase a person’s risk.
Crohn’s disease. Crohn’s disease is a chronic inflammation of the gastrointestinal tract. People with Crohn’s disease have a higher risk of colorectal and small bowel cancers.
Celiac disease. Celiac disease is a digestive disease that interferes with the absorption of nutrients from food in the small bowel. The body’s immune system responds to a protein called gluten—which is found in wheat, rye, barley, and oats—and can damage the lining of the small bowel.
Familial adenomatous polyposis (FAP). FAP is an inherited condition characterized by hundreds or thousands of colon polyps (small growths). The polyps are usually benign (noncancerous), but there is nearly a 100% chance that the polyps will develop into cancer if left untreated. Individuals with FAP are also at risk for other types of cancer, including stomach cancer, duodenal cancer, thyroid cancer, pancreatic cancer, and hepatoblastoma (liver cancer seen mainly in early childhood). Learn more about familial adenomatous polyposis.