Also called gastrointestinal carcinoid tumor. This is an indolent (slow-growing) cancer that forms in cells that make hormones in the lining of the gastrointestinal tract (the stomach and intestines). Quite often it occurs in the appendix (a small fingerlike pouch of the large intestine), small intestine, or rectum. Our experience has shown that having gastrointestinal carcinoid tumor increases the risk of forming other cancers of the digestive system.
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