What is "carcinoid"

carcinoid \carcinoid\ [From Gr. karki`nos, a crab + -oid.] n. A small tumor (benign or malignant) arising from the mucosa of the gastrointestinal tract; it is usually associated with excessive secretion of serotonin.

n. (context medicine English) A form of slow-growing tumour originating in the neuroendocrine system.

n. a small tumor (benign or malignant) arising from the mucosa of the gastrointestinal tract; usually associated with excessive secretion of serotonin

Carcinoid (also carcinoid tumor) is a slow-growing type of neuroendocrine tumor originating in the cells of the neuroendocrine system. In some cases, metastasis may occur. Carcinoid tumors of the midgut ( jejunum, ileum, appendix, and cecum) are associated with carcinoid syndrome.