Guselkumab‐associated bullous pemphigoid in a psoriasis patient: A case report and review of the literature

Drug-induced bullous pemphigoid (DBP) associated to biologics administered for psoriasis is rare. DBP has been described especially in association with anti-TNF-α drugs and anti-IL12 and 23, but never in relation to guselkumab (anti-IL23). We report the case of a 76-year-old male patient with severe psoriasis (PASI 20), presenting with generalized tense bullae and erosions after being recently switched to guselkumab therapy. Histology and direct...