Abstract |
Using liquid chromatography, we estimated the urinary excretion of 20 alpha-dihydrocortisol (20-DH) and urinary free cortisol (UFC) in normal subjects and in 40 patients with Cushing's syndrome of different etiologies. The median normal excretion rate (nmol/24 h) was 174 for 20-DH and 68 for UFC, the 20-DH/UFC ratio thus being 2.55. For patients with Cushing's syndrome, the excretion rate was 1798 for 20-DH and 298 for UFC, the ratio 6.03. We evaluated the effect of acute stimulation of adrenal secretion on 20-DH and UFC by administering corticotropin to six normal subjects. After such stimulation, the excretion rate was 566 for 20-DH and 1238 for UFC (ratio 0.45). Whereas 20-DH excretion rate exceeded the normal range in all patients, six patients had normal or even below-normal values for UFC excretion. Evidently, measurement of urinary 20-DH is a better test for chronic hypercorticoidism than is measurement of urinary UFC, and chronic hypercorticoidism can be differentiated from the acute state by the 20-DH/UFC ratio.
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Authors | M Schöneshöfer, B Weber, W Oelkers, K Nahoul, F Mantero |
Journal | Clinical chemistry
(Clin Chem)
Vol. 32
Issue 5
Pg. 808-10
(May 1986)
ISSN: 0009-9147 [Print] England |
PMID | 3009052
(Publication Type: Journal Article)
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Chemical References |
- 20-hydroxycortisol
- Adrenocorticotropic Hormone
- Hydrocortisone
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Topics |
- Adrenocorticotropic Hormone
- Cushing Syndrome
(diagnosis, urine)
- Female
- Humans
- Hydrocortisone
(analogs & derivatives, urine)
- Male
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