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MSH: A subtype of enteroendocrine cells found in the gastrointestinal MUCOSA, particularly in the glands of PYLORIC ANTRUM; DUODENUM; and ILEUM. These cells secrete mainly SEROTONIN and some neuropeptides. Their secretory granules stain readily with silver (argentaffin stain).,NCI: A group of basal granular cells of the gut whose granules stain readily with silver and chromium salts. The cells secrete serotonin, substance P, and enkephalins. (MeSH),NCI: An enteroendocrine cell located in the basilar portions of the glands of the gastrointestinal tract. The granules in the cell stain readily with chromium and silver salts without pretreatment with a reducing agent.
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