Tineа Corporis with Trichophyton Rubrum Mimicking a Flare-Up of Psoriasis UnderTreatment with IL17-Inhibitor Ixekizumab.

Biologics, as IL17 inhibitors, are frequently prescribed for moderate to severe plaque psoriasis. Although mucocutaneous candida infections are a well-known side effect of IL-17 inhibitors, there is no data about dermatophyte infection under this therapy. Generalized tinea corporis can mimic the clinical picture of psoriasis, especially if concomitant treatment with topical corticosteroids is used. Therefore, physician should be aware of this differential diagnosis if they suspect a loss of efficacy of IL-17-inhibitors with a flare-up of psoriasis.