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DOI: 10.1055/s-2003-44288
J. A. Barth Verlag in Georg Thieme Verlag Stuttgart · New York
Adrenocortical Tumors: Prevalence of Impaired Glucose Tolerance and of “Paradoxical Rise” of Cortisol During an Oral Glucose Tolerance Test
Publication History
Received: September 20, 2002
First decision: October 20, 2002
Accepted: February 24, 2003
Publication Date:
13 November 2003 (online)

Abstract
Glucose tolerance and the behaviour of cortisol during an oral glucose tolerance test (OGTT) was investigated in 126 patients with adrenal “incidentalomas” (age: > 45 years) and in 129 age-matched controls. Impaired glucose tolerance (IGT) was found to be more common (p < 0.02) among patients with adrenal incidentalomas. Subdividing these patients by their body weight it was found that 29 % (controls: 25 %) of those with normal body weight (BMI 20 - 25 kg/m2) had IGT/DM. In overweight (BMI 25 - 30 kg/m2) and obese patients (BMI 30 - 40 kg/m2) the share of IGT/DM was 32 % (controls: 19 %) and 66 % (controls 42 %), respectively. The prevalence of a “paradoxical” rise in serum cortisol concentrations during the OGTT was slightly higher (p < 0.05) among patients with adrenal incidentaloma than among controls. Patients as well as controls with this abnormal behaviour of cortisol were characterized by lower basal serum cortisol concentrations (p < 0.01) but no association was seen with either the presence of IGT or with post-dexamethasone concentrations of serum cortisol. Thus both in patients with and without adrenal incidentalomas abnormal glucose tolerance is an age- and weight-dependent phenomenon unrelated to the post-prandial behaviour of serum cortisol concentrations.
Key words
Adrenal incidentaloma - adrenal adenoma - impaired glucose tolerance - cortisol - age - body weight
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M. D. H. Vierhapper
Clinical Division of Endocrinology and Metabolism, Department of Internal Medicine III
University of Vienna
Währinger Gürtel 18 - 20
1090 Wien
Austria
Phone: +43(1)404004348
Fax: + 43 (1) 4 04 00 62 10
Email: h.vierhapper@akh-wien.ac.at