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Insulin Resistance in a Young Man With Cystic Fibrosis

Mitchell E. Geffner, MD; Barbara M. Lippe, MD; Robert M. Itami, MD; Solomon A. Kaplan, MD; Baiba K. Gillard, PhD; Seymour R. Levin, MD; Ian L. Taylor, MD
Am J Dis Child. 1984;138(7):677-680. doi:10.1001/archpedi.1984.02140450059018.
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• An 18-year-old man had cystic fibrosis (CF) and insulin-resistant carbohydrate intolerance characterized by (1) obesity, basal hyperinsulinemia, and hyperglucagonemia; (2) impaired oral glucose tolerance; (3) hyperinsulinemia in response to oral and intravenous (IV) administration of glucose and to IV administration of tolbutamide; (4) exaggerated gastric inhibitory polypeptide secretion following orally administered glucose; and (5) diminished sensitivity to insulin administered IV compared with other patients with CF. Both parents also demonstrate basal and stimulated hyperinsulinemia in response to orally administered glucose. The long-term outlook for patients with CF is improving, and more patients are surviving childhood. Thus, it should be recognized that an insulin-resistant form of carbohydrate intolerance may develop in patients with CF with obesity and/or genetic risk factors.

(AJDC 1984;138:677-680)

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