gastrointestinal carcinoid tumors treatment pdq treatment patient information nci nci

A gastrointestinal carcinoid tumor is cancer that forms in the lining of the gastrointestinal tract. The gastrointestinal (GI) tract is part of the body's digestive system. It helps to digest food, takes nutrients (vitamins, minerals, carbohydrates, fats, proteins, and water) from food to be used by the body and...