Trichoscopic Signs in Androgenetic Alopecia

    January 2022 in “ Klinicheskaya dermatologiya i venerologiya ”
    T.V. Tsimbalenko, A.G. Gadzhigoroeva
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    TLDR Trichoscopy can diagnose hair loss by looking for common signs like uneven hair thickness, "yellow dots," and more thin hairs, which are found in both men and women.
    Trichoscopy is a non-invasive method used to diagnose androgenetic alopecia (AGA). This study aimed to evaluate the frequency of trichoscopic markers in patients with AGA based on gender and stage of hair loss. A total of 92 patients with AGA were examined using trichoscopy. The most common trichoscopic markers in patients with AGA were anisotrichosis, presence of "yellow dots," and increased proportion of vellus hairs, which were observed in 86%, 85%, and 83% of cases, respectively. The frequency of these markers did not significantly differ based on gender. In advanced stages of AGA, there was a decrease in the frequency of vellus hairs (64% vs. 91%) and an increase in the frequency of single follicular units (86% vs. 45%). The presence of two out of three of these markers provided a diagnosis of AGA with a sensitivity of 73% in early stages and 78% in advanced stages.
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