Alopecia areata is a common form of non-scarring hair loss of unknown origin. Dermatoscopy is very useful for its diagnosis, prognosis, and treatment monitoring. Several dermatoscopic features have been identified, including dystrophic hair shafts (broken hairs, micro-exclamation mark hairs, and black dots), which suggest active disease, yellow dots, seen both in acute and chronic forms, and hypopigmented vellus hairs, typical of early disease remission.
Alopecia areata Hair loss Alopecia Dystrophic hair shafts Broken hairs Micro-exclamation mark hairs Black dots Yellow dots Vellus hairs
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