It's Not All Traction: The Pseudo 'Fringe Sign' in Frontal Fibrosing Alopecia

    July 2015 in “ British Journal of Dermatology ”
    Rodrigo Pirmez, Bruna Duque‐Estrada, Leonardo Spagnol Abraham, Giselle Martins Pinto, Débora Cadore de Farias, Yanna Kelly, Isabella Doche
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    TLDR The pseudo 'fringe sign' can also appear in frontal fibrosing alopecia, not just in traction alopecia, showing that this condition may be more common than thought.
    The document reported on a study involving 16 patients with frontal fibrosing alopecia (FFA) who exhibited a pseudo 'fringe sign', a feature usually seen in traction alopecia (TA). The patients, aged 30 to 79, were mostly female and from diverse ethnic backgrounds. They showed a band of hair loss with some hairs remaining along the hairline. Dermoscopic examination and punch biopsies confirmed FFA, characterized by reduced follicular units, perifollicular lichenoid inflammation, concentric fibrosis, and loss of sebaceous glands. The study concluded that the pseudo 'fringe sign' can occur in FFA, indicating that FFA might be more widespread than previously recognized, and that biopsy is essential for accurate diagnosis in suspected cases.
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