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Sang Hyun Chun  (Chun SH) 1 Article
Evaluation of Glucone Tolerance and Insulin Secretion in Two Patients with Primary Hyperparathyroidism Before and After Surgery.
Sung Hee Ihm, Moon Gi Choi, Hyung Joon Yoo, Sang Hyun Chun, Yong Seok Choi, Gun Yong Lee, In Seo Lim, Sung Woo Park
J Korean Endocr Soc. 1994;9(1):54-58.   Published online November 6, 2019
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It is reported that patients with primary hyperparathyroidism(PHPT) have disturbances in carbohydrate metabolism: in particular, hyperinsulinemia and insulin resistance are characteristic early metabolic aberrations of this disease. However, it is not clear whether changes of insulin secretion or insulin sensitivity are observed in all patients with PHPT, including those with normal glucose tolerance. Also, it is not clear whether these changes are reversible after surgical correction of PHPT. In the present study, glucose tolerance and insulin secretion were evaluated in 2 symptomatic patients with PHPT during 100g oral glucose tolerance test before and after parathyroid adenoma removal. Comparing these patients before and after surgery, glucose tolerance was not significantly different. However, C-peptide and insulin secretion was low after surgical correction of PHPT compared to the preoperative situation. This observation suggests that insulin hypersecretion in patients with PHPT precedes glucose intolerance and this early disturbance is reversible after surgery.
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Endocrinol Metab : Endocrinology and Metabolism