Trichoscopy I: Non-Cicatricial Alopecia
March 2021
in “
CRC Press eBooks
”
New to Alopecia Areata? There is a guide in the encyclopedia. Read the guide → trichoscopy non-cicatricial alopecia androgenetic alopecia anisotrichosis hair shaft thickness heterogeneity white dots honeycomb pattern perifollicular fibrosis hair follicle openings yellow dots follicular infundibula sebum keratotic material alopecia areata exclamation mark hairs hypopigmented hyperpigmented tapered hairs dermoscope hair loss hair thickness variation scalp fibrosis hair breakage scalp oil skin debris hair thinning scalp examination
Studysummary This review discusses the various trichoscopic features of androgenetic alopecia and alopecia areata, noting white dots in advanced cases as indicators of poor prognosis, but reports no new clinical results.
Our plain-language summary. Not medical advice or a treatment recommendation. Consult a qualified healthcare professional before changing treatment. Full disclaimer
The document "Trichoscopy I: Non-Cicatricial Alopecia" discusses the trichoscopic features of androgenetic alopecia, a common type of hair loss. The most common feature is anisotrichosis, or hair shaft thickness heterogeneity. In severe cases, non-specific findings such as white dots and a honeycomb pattern can be detected, which are considered poor prognostic factors. These white dots represent areas of perifollicular fibrosis and hair follicle openings. Yellow dots, which correspond to follicular infundibula filled with sebum and/or keratotic material, are characteristic of alopecia areata and are abundant and regularly distributed. The document also describes exclamation mark hairs, which are fractured hairs with a thin, usually hypopigmented, proximal end and a thicker, often hyperpigmented, distal end. Tapered hairs are elongated exclamation mark hairs with a thinner proximal end and the distal end outside of the field of view of a dermoscope.
