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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



carcinoid  listen  (KAR-sih-noyd)

  A slow-growing type of tumor usually found in the gastrointestinal system (most often in the appendix), and sometimes in the lungs or other sites. Carcinoid tumors may spread to the liver or other sites in the body, and they may secrete substances such as serotonin or prostaglandins, causing carcinoid syndrome.