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Journal of Clinical Endocrinology & Metabolism, Vol 48, 348-351, Copyright © 1979 by Endocrine Society

ARTICLES

Plasma corticotropin and cortisol in patients with pituitary adenomas

J Lindholm, L Hummer, H Kehlet, J Riishede, M Blichert-Toft and B Dinesen

Plasma ACTH and cortisol were measured during insulin-induced hypoglycemia in 39 patients with a pituitary adenoma or after hypophysectomy and in 26 healthy persons. Adrenocortical insufficiency was defined as failure to increase plasma cortisol to at least 500 nmol/liter (18 microgram/dl) during hypoglycemia. No proper distinction was possible between patients with normal and impaired cortisol response to hypoglycemia on the basis of the ACTH results. When all 39 patients were compared to the 26 controls, the cortisol results differed significantly, but those of ACTH did not. These results demonstrate a limited value of ACTH measurements in secondary adrenocortical failure.




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Copyright © 1979 by The Endocrine Society