Definition: An endocrine tumor, usually originating in the pancreas, which produces a vasoactive intestinal polypeptide believed to cause profound cardiovascular and electrolyte changes with vasodilatory hypotension, watery diarrhea, hypokalemia, and dehydration.
[vasoactive intestinal polypeptide + G. -oma, tumor]
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Examples: glitazone, GI cocktail, etc.