Trichoscopy Patterns in Alopecia Areata: A Systematic Review and Meta-Analysis

June 2023 in “ Skin Research and Technology ”

Mohammed Saleh Al-Dhubaibi, Adel Alsenaid, Ghadah Alhetheli, Ahmed Ibrahim Abd Elneam

alopecia areata trichoscopy yellow dots black dots broken hairs short vellus hairs tapering hairs AA

TLDR Yellow dots and short vellus hairs are the most common signs of Alopecia Areata (AA), and trichoscopy can help diagnose AA and track treatment progress.

The systematic review and meta-analysis included 39 studies with 3204 patients suffering from Alopecia Areata (AA). The study aimed to identify the most characteristic trichoscopic features in AA patients, which were found to be yellow dots (61%), black dots (56%), broken hairs (40%), short vellus hairs (46%), and tapering hairs (35%). Yellow dots and short vellus hairs were the most sensitive indicators of AA, while black dots and tapering hairs were the most specific diagnostic markers. The prevalence of these features varied by continent and patient category (adults, children, or both), and was higher in cross-sectional studies compared to non-cross-sectional studies. The study concluded that trichoscopy can provide sufficient diagnostic information for AA and monitor treatment response.

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