A risk factor is anything that increases a person’s chance of developing a tumor. Although risk factors often influence the development of cancer, most do not directly cause a tumor. Some people with several risk factors never develop the disease, while others with no known risk factors do.
The causes of DIG are unknown. There are no known risk factors or ways to prevent the disease.
The next section in this guide is Symptoms and Signs  and it explains what body changes or medical problems this disease can cause. Or, use the menu on the side of your screen to choose another section to continue reading this guide.