alexa Contrast enhanced phototrichogram pinpoints scalp hair changes in androgen sensitive areas of male androgenetic alopecia.
Dermatology

Dermatology

Hair Therapy & Transplantation

Author(s): Leroy T, Van Neste D

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Abstract BACKGROUND/AIM: In male androgenetic alopecia (AGA), global changes of scalp hair observed on many years are the cumulative result of discrete changes. Such changes reflect structural and/or functional modifications occurring at the level of individual hair follicles. The patterning of scalp hair loss is the phenotypic expression of clusters of hormone sensitive follicles located in specific scalp areas. The aim of this study was to evaluate, in 21 untreated male subjects with AGA, the relation between various hair measurements using a new validated photographic method with clinical staging (modified Norwood-Hamilton scale) as compared with five controls. METHODS: As recently demonstrated by comparison with transverse sectioning of scalp biopsies, dynamic changes occurring at the level of individual hair follicles can be accurately explored with the contrast enhanced phototrichogram technique (CE-PTG). This is a further improvement of the PTG (combined analysis of two photographs taken at 48 h interval) using contrast enhancement together with the scalp immersion proxigraphy method. Visible hair counts per unit area were first evaluated on photographs without and with CE. Then other scalp hair variables (anagen hair counts and proportion of thin hair ( This article was published in Skin Res Technol and referenced in Hair Therapy & Transplantation

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