Hair Counts from Normal Scalp Biopsy in Taiwan

    September 2012 in “ Dermatologic Surgery
    Jui‐Hung Ko, Yu‐Huei Huang, Tseng‐Tong Kuo
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    TLDR The conclusion is that normal scalp hair counts for Taiwanese people were established, showing age-related differences but not sex or scalp location differences.
    The study conducted on 31 Taiwanese patients undergoing scalp surgery for non-hair-loss disorders established normal scalp hair counts for this population. Analysis of two 4-mm punch biopsies from each patient revealed average counts of 21.3 total hairs, 20.5 terminal hairs, 0.8 vellus hairs, and 9.4 follicular units, with a hair density of 1.69 mm². The anagen to telogen hair ratio was 91.6:8.4, and the terminal to vellus hair ratio was 25.3:1. Age, but not sex or scalp location, influenced hair counts. These findings highlight ethnic differences in hair characteristics and provide a reference for diagnosing hair disorders in Asians.
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