NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,863 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

A type of tumor that usually begins in cells in the wall of the gastrointestinal tract. It can be benign or malignant. Also called gastrointestinal stromal tumor.

EnlargeDrawing of the gastrointestinal tract showing the esophagus, stomach, colon, small intestine, and rectum.

Gastrointestinal stromal tumors (GISTs) may be found anywhere in or near the gastrointestinal tract.