carcinoid

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carcinoid (argentaffinoma) (kar-sin-oid) n. a tumour of the argentaffin cells in the glands of the intestine (see apudoma). Carcinoids typically occur in the tip of the appendix and are among the commonest tumours of the small intestine. c. syndrome the combination of flushing, headache, diarrhoea, and bronchial constriction that occurs when a carcinoid has spread to the liver and is caused by the peptides it releases.