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  • Title: Hyper-adrenocorticotropinemia in a patient with Addison's disease after treatment with corticosteroids.
    Author: Sugiyama K, Kimura M, Abe T, Ikezawa Y, Manaka H, Yamatani K, Tominaga M, Sasaki H, Misawa T.
    Journal: Intern Med; 1996 Jul; 35(7):555-9. PubMed ID: 8842762.
    Abstract:
    A 40-year-old man with Addison's disease due to adrenal tuberculosis retained high levels of adrenocorticotropic hormone (ACTH) after conventional hydrocortisone replacement. Plasma ACTH levels were completely suppressed by usual replacement with hydrocortisone (20 mg at 8:00 and 10 mg at 21:00) but rebounded to abnormally high levels the following morning. Administration of 2 mg or 8 mg of dexamethasone suppressed ACTH and cortisol. Magnetic resonance imaging of the brain showed a low-intensity lesion of the pituitary gland. Pituitary hyperplasia or microadenoma with preserved regulation of ACTH was considered to be the cause of the high plasma ACTH levels. The combination of hydrocortisone and dexamethasone reduced plasma ACTH levels.
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