Trichoscopic Features of Androgenic Alopecia and Telogen Effluvium

January 2021 in “ International journal of dermatology, venereology and leprosy sciences ”

Anvitha C, Sujay Srinivas

androgenic alopecia telogen effluvium trichoscopic features yellow dots empty hair follicles peripilar sign vellus hair hair shaft diameter variation frontotemporal areas occipital areas AGA TE

TLDR AGA and TE can be differentiated by specific trichoscopic features, with AGA showing more variation in hair thickness in fronto-temporal areas.

The study conducted by Dr. Anvitha C and Dr. Srinivas S focused on identifying trichoscopic features of androgenic alopecia (AGA) and telogen effluvium (TE) in 100 patients. It found that 69% had AGA and 31% had TE. Key trichoscopic features for AGA included yellow dots (69%), empty hair follicles (65%), peripilar sign (71%), vellus hair (95%), and variation in hair shaft diameter in frontotemporal areas (98%). For TE, the features included peripilar sign (10%), yellow dots (29%), and vellus hair (30%), with variation in hair shaft diameter in fronto-temporal (15%) and occipital areas (65%). The study concluded that AGA and TE can be differentiated by specific trichoscopic features, with AGA showing more variation in hair shaft thickness in fronto-temporal areas.

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