Urticaria Multiforme - Generalized polycyclic annular rash with wheals and ecchymotic centers (Panel A). Physical examination was notable for acral edema and a blanching arcuate urticarial rash (Panels B and C, respectively). Dermographism was elicited by pressure from a pen (Panel D). #Clinical #Derm #Urticaria #Multiforme #UrticariaMultiforme #Rash #NEJM