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The enterochromaffin cells found throughout the GI and bronchial tracts are the primary source of enteroid tumours (NETs), which are a type of NET.1,2 Many biologically active substances, such as serotonin, norepinephrine, dopamine, histamine, bradykinin, prostaglandins, substance P, and others, are produced, stored, and secreted by these cells, which may result in the development of […]