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img  4:  Safety and efficacy of anastrozole for the treatment of pubertal gynecomastia: a randomized, double-blind, placebo-controlled trial.
 
著者: Paul V Plourde, Edward O Reiter, Hann-Chang Jou, Paul E Desrochers, Stephen D Rubin, Barry B Bercu, Frank B Diamond, Philippe F Backeljauw
雑誌名: J Clin Endocrinol Metab. 2004 Sep;89(9):4428-33. doi: 10.1210/jc.2004-0082.
Abstract/Text Pubertal gynecomastia is thought to result from transient imbalances between estrogen and androgen concentrations. Anastrozole (ARIMIDEX), a potent and selective aromatase inhibitor, decreases estrogen and increases testosterone concentrations in pubertal boys. The safety and efficacy of anastrozole for the treatment of pubertal gynecomastia were evaluated. In a randomized, double-blind, placebo-controlled study of 80 boys, aged 11-18 yr, with pubertal gynecomastia that had not reduced over a 3-month interval, subjects received either anastrozole (1 mg) or placebo once daily for 6 months. A response was defined as a 50% or greater reduction in the calculated volume of both breasts combined using ultrasonography measurements. A comparison of response rates was performed using logistic regression analysis. Secondary end points included changes in serum hormone concentrations. The percentage of patients with a response was 38.5% for the anastrozole group and 31.4% for the placebo group (odds ratio, 1.513; 95% confidence interval, 0.496-4.844; P = 0.47). At 6 months, the median percent change in the testosterone/estradiol ratio was 166% for the anastrozole group and 39% for the placebo group. Anastrozole treatment was well tolerated. In patients with pubertal gynecomastia, no significant difference in the percentage of patients with a 50% or greater reduction in total breast volume, as calculated from ultrasonography measurements, was demonstrated between the anastrozole and placebo groups.

PMID 15356042  J Clin Endocrinol Metab. 2004 Sep;89(9):4428-33. doi: 10.1210/jc.2004-0082.
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