Abstract
The behaviour of 5 alpha-reduced metabolites of testosterone, dihydrotestosterone1, 3 alpha-androstanediol and 3 beta-androstanediol, was studied in 36 hirsute women: Group I: 24 patients with high plasma levels of testosterone, androstenedione and/or dehydroepiandrosterone sulphate and Group II: 12 patients with normal plasma concentrations of these steroids. Testosterone and its 5 alpha-reduced metabolites were determined by radioimmunoassay after chromatographic separation on celite 535 microcolumns. Plasma 3 alpha-androstanediol was found to be elevated both in Group I (26.9 +/- 10.8 SD ng/100 ml) and in Group II patients (23.2 +/- 10.5 SD ng/100 ml). 3 beta-Androstanediol and dihydrotestosterone, on the contrary, were elevated in only a few cases: in 6 cases in Group I and in 2 and in 1 case, respectively, in Group II. The finding of high plasma 3 alpha-androstanediol levels in hirsute women, with normal values of the other androgens, may be an index of hirsutism of peripheral origin, since this steroid is produced almost exclusively in the extraglandular compartment.
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