All you need to know about testosterone results: caution and feedback from laboratories - 03/09/26
: Drfor the Groupe de Biologie Hormonale et Spécialisée 16
Highlights |
• | Total testosterone measurement should be the first-line test |
• | LCMSMS is the gold standard for low testosterone, particularly in women or children |
• | Free or bioavailable testosterone may be indicated in few specific cases |
• | Testosterone concentrations depend on sex, age & analytical method |
Abstract |
This article, presenting three clinical cases, discusses the analytical issues of testosterone measurement in blood (immunoassay and liquid chromatography and mass spectrometry). It also describes the different circulating testosterone fractions (total, free and bioavailable) and how to measure or calculate them.
Beyond these analytical aspects, the article addresses the challenges encountered in establishing reference ranges and the specific difficulties related to different patient populations: men, women and children. Finally, in light of the evidence outlined in the article, we review the three cases.
Le texte complet de cet article est disponible en PDF.Key-words : testosterone, free testosterone, bioavailable testosterone, sex hormone binding globulin, LCMSMS, immunoassay
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