Contact Immunotherapy-Induced Renbök Phenomenon in a Patient with Alopecia Areata and Psoriasis Vulgaris

    January 2010 in “ European Journal of Dermatology ”
    Taisuke Ito, Hideo Hashizume, Masahiro Takigawa
    TLDR Contact immunotherapy helped hair regrow in a patient with both alopecia and psoriasis.
    The document described a case of a patient with both alopecia areata (AA) and psoriasis vulgaris who experienced the Renbök phenomenon following contact immunotherapy. The Renbök phenomenon, first introduced by Happle et al., refers to the observation of normal hair growth within psoriatic lesions in patients with co-existing psoriasis and AA. The exact mechanism behind this phenomenon remained unclear. The study highlighted the potential of contact immunotherapy to induce this unique response, providing insights into the complex interactions between these two dermatological conditions.
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