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GIST

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Overview

GIST is a relatively rare type of cancer. It originates in the "pacemakers" cells or named the interstitial cells of Cajal (ICCs) which locate in the wall of the GI tract. Most GIST tumors start from the stomach, but they may occur anywhere along the digestive tract from the esophagus, small intestine, rectum, colon, to the anus. More than half of all GIST arises in the stomach, while about one fourth develops in the small intestine. GIST is usually diagnosed in people older than 50, and slightly more cases in men versus women. Researches reveal that most GIST patients have a mutated c-kit gene, but the exact reason that the mutation causes this disease is still not completely clear.

Signs, symptoms and treatments

Many GIST patients with small tumor display no symptom, while pain or discomfort is usually to be the representative symptom on patient with tumor in larger size and/or at aggressive stage. Other symptoms such as vomiting, diarrhea, fatigue, loss of appetite, vomiting of blood and weight loss are also common in clinical reports. The primary option for treating early-stage GIST is still surgery, however, the radiation therapy can't show a satisfied prognosis. Therefore, unlike other common digestive tract cancers, GIST requires a more specially individualized treatment programme.

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