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Gastrointestinal Complications (PDQ®): Supportive care - Patient Information [NCI] - General Information

The gastrointestinal (GI) tract is part of the digestive system, which processes nutrients (vitamins, minerals, carbohydrates, fats, proteins, and water) in foods that are eaten and helps pass waste material out of the body. The GI tract includes the stomach and intestines (bowels). The stomach is a J-shaped organ in the upper abdomen. Food moves from the throat to the stomach through a hollow, muscular tube called the esophagus. After leaving the stomach, partly-digested food passes into the small intestine and then into the large intestine (colon). The last 6 inches of the large intestine are the rectum and the anal canal. The anal canal ends at the anus (the opening of the large intestine to the outside of the body).
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Anatomy of the lower digestive system, showing the colon and other organs.

GI complications are common in cancer patients. Complications are medical problems that occur during a disease, or after a procedure or treatment. They may be caused by the disease, procedure, or treatment, or may have other causes. This summary describes the following GI complications and their causes and treatments:

This summary is about GI complications in adults with cancer. Treatment of GI complications in children is different than treatment for adults.

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WebMD Public Information from the National Cancer Institute

Last Updated: February 25, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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