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  • Title: Endocrine pancreatic function in pheochromocytoma.
    Author: Sicolo N, Federspil G, De Palo CB, Vettor R, Martini C, Scandellari C.
    Journal: J Endocrinol Invest; 1991 Mar; 14(3):225-9. PubMed ID: 2071824.
    Abstract:
    In six patients with pheochromocytoma oral glucose tolerance test (OGTT) and arginine test were carried out. Blood insulin and glucagon response were investigated. In subjects with adrenal tumor glycemic curve pattern was typical: a rapid and exaggerated increase of glycemia followed by an abrupt drop. Absolute insulinemic response to oral glucose was normal, but inappropriate to glycemic stimulus. Arginine infusion provoked a slightly above normal increase in blood glucose and a normal increase in blood glucagon. In three of the patients studied postoperatively, reduced glycemic response to glucose was observed, whereas there were no evident variations in blood insulin and glucagon response. These data suggest that in pheochromocytoma impaired glucose tolerance is partly due to the reduced insulin response to oral glucose load.
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