Psoriatic arthritis is a chronic, seronegative spondyloarthropathy associated with psoriasis, depending on patient presentation treatment options range from non-pharmacologic measures to NSAIDs, DMARDs, and biologics. Secukinumab is a human monoclonal antibody that specifically targets interleukin-17 and has been shown to be highly effective in the treatment of psoriatic arthritis. As the use of IL-17 inhibitors has been approved in the treatment of psoriatic arthritis, clinicians need to be aware of unusual adverse events not previously observed in clinical trials. We report a rare case of Henoch-Schönlein purpura vasculitis induced by secukinumab in a 39-year-old patient. Therefore, using biologic drugs in clinical practice should be aware that cutaneous vasculitis may be triggered by anti-IL17 treatment, and early diagnosis always helps to decrease morbidity and reduce the amount of time to recovery as well as the impact on the quality of life disruption.
Keywords: Biologics; Henoch-Schönlein purpura; IL-17; Psoriatic arthritis; Rheumatology; Secukinumab.