The Digestive Tract Cancers Medical Program, also known as the gastrointestinal tract or GI, is a tubular passage extending from the mouth to the anus. Its main function is to consume and digest food, extract nutrition and energy from it and then eliminate waste. The tract includes the esophagus, stomach, the intestines, pancreas, gallbladder and the liver. Cancer in the gastrointestinal tract, which is the most common type of cancer, refers to the development of cancerous tumours in any organ in the digestive tract.
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