Trichoscopic Criteria of Female Pattern Hair Loss

This study analyzed the differences in hair thickness and percentage of thin hairs between healthy controls, androgenic alopecia, and chronic telogen effluvium in 150 women. The study established diagnostic criteria for female androgenic alopecia based on trichoscopy criteria, including major criteria of increased number of yellow dots, thin hairs, and decreased average hair thickness in the frontal area, and minor criteria of increased frontal area to occiput ratio of single-hair units, vellus hairs, and follicles with perifollicular discoloration. The study concluded that the diagnosis of female androgenetic alopecia may be established based solely on trichoscopy criteria.