Coudability Hairs: A Revisited Sign of Alopecia Areata Assessed by Trichoscopy

    Shigeki Inui, Takeshi Nakajima, Satoshi Itami
    TLDR Coudability hairs are useful markers for alopecia areata activity.
    The study assessed the usefulness of "coudability hairs" as a clinical indicator for alopecia areata (AA) using trichoscopy on 100 East Asian patients. The results showed that coudability scores positively correlated with AA disease activity, hair-pull tests, short disease duration, black dots, and exclamation-mark hairs, while negatively correlating with short vellus hairs. The study concluded that coudability hairs are valuable markers for AA disease activity and can serve as a substitute for the hair-pull test.
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