Abstract
Serum dehydroepiandrosterone sulfate (DHEA-S) concentrations were studied in 84 untreated patients with secondary adrenal insufficiency. Compared to values in normal subjects of corresponding age, DHEA-S levels were decreased in 80 patients. The decrease was unrelated to the cause of the secondary adrenal insufficiency or the serum PRL level. Serum cortisol concentrations, on the other hand, were low in 71 patients and low normal in the remaining 13. Serum DHEA-S levels were decreased in 11 of these 13 patients. The frequency of decreased serum DHEA-S levels in patients with secondary adrenal insufficiency was significantly higher than that of decreased cortisol levels. These results suggest that decreased serum DHEA-S levels reflect deficient ACTH secretion in secondary adrenal insufficiency and that simultaneous determination of serum DHEA-S and cortisol levels is useful in the diagnosis of this pathological state.
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