Secukinumab emerges as a rapidly effective therapy for pityriasis rubra pilaris.

Refractory pityriasis rubra pilaris (PRP) often is treated off-label with the same biologic therapies that are approved for the treatment of psoriasis, most commonly tumor necrosis factor (TNF) α antagonists and ustekinumab; however, the IL-17A antagonist secukinumab also has shown efficacy in the treatment of PRP. We report 2 new cases of severe refractory PRP that responded rapidly to treatment with secukinumab.