LC-MS/MS Improves Screening Towards 21-Hydroxylase Deficiency

    December 2014 in “ Gynecological Endocrinology
    Urszula Ambroziak, Anna Kępczyńska-Nyk, Alina Kurylowicz, Aleksandra Wysłouch-Cieszyńska, E Małunowicz, Zbigniew Bartoszewicz, Agnieszka Kondracka, Radoslaw Jazwiec, Emilia Pawłowska, Magdalena Szcześniak, Michal Dadlez, Tomasz Bednarczuk
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    TLDR LC-MS/MS is more reliable than immunoassays for diagnosing 21-hydroxylase deficiency.
    The study compared the accuracy of immunoassays to LC-MS/MS in measuring serum 17-hydroxyprogesterone (17OHP) and androgens in 39 women with hyperandrogenism and 29 controls. It found that immunoassays reported significantly higher median 17OHP levels than LC-MS/MS in both groups, leading to unnecessary additional diagnostic procedures in up to 85% of patients with immunoassays, compared to none with LC-MS/MS. The study also found that concentrations of total testosterone, androstendione, and DHEA-S were significantly higher when measured by immunoassays. LC-MS/MS showed 100% sensitivity, specificity, and test accuracy, with no false positives or negatives. The final diagnosis revealed 61.5% with PCOS, 31% with idiopathic hyperandrogenism, 5% with CAH, and 2.5% with ACC. The study concluded that LC-MS/MS is a more reliable diagnostic tool for measuring serum 17OHP and androgens, suggesting its adoption in commercial laboratories is imminent.
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