Summary
The urinary testosterone excretion in 55 patients with Klinefelter's syndrome was determined by gas-chromatographic methods. The mean testosterone level in the group of Klinefelter patients was significantly decreased (15.7 μg/24 hrs) compared with the excretion by 30 normal men (44.1 μg/24 hrs). An age dependency of excretion levels was not obvious in chromatin-positive men when compared to healthy subjects. A correlation between testosterone excretion and configuration types seemed to be probable by reason of observations and statistical values. Average testosterone excretion increased with increasing normalization of body proportions. Gynecomastia was noticed in 56% of those examined. With increasing severity of gynecomastia the mean testosterone levels decreased. A correlation between beard and body hair, which was decreased in almost all subjects, and testosterone excretion was not visible. With diminishing mean testosterone excretion an increase of osteoporosis seemed to be probable. A statistically significant difference was found when comparing patients who never had ejaculations with those who had regular libido and ejaculations. Klinefelter patients who had not succeeded in completing school or an occupational education showed a significantly decreased testosterone level as compared with others who had a profession.
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Niermann, H., Lenau, H., Ayi-Bonte, G. et al. Excretion of urinary testosterone in Klinefelter's syndrome. Hum Genet 26, 61–70 (1975). https://doi.org/10.1007/BF00280285
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DOI: https://doi.org/10.1007/BF00280285