glucagonoma

A glucagon-secreting tumor, usually derived from pancreatic islet cells.

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n.

a pancreatic tumour that secretes glucagon and produces attacks of hypoglycaemia.

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glu·ca·gon·o·ma (gloo″kə-gon-oґmə) a type of islet cell tumor of the alpha cells that secretes glucagon; some are malignant. See also glucagonoma syndrome, under syndrome.