Recalcitrant annular pustular psoriasis associated with psoriatic arthritis successfully treated with secukinumab

Pustular psoriasis is a well-known form of psoriasis, the main variants of which are acute generalized pustular psoriasis (GPP), including GPP of pregnancy, annular pustular psoriasis (APP), acrodermatitis continua of Hallopeau (ACH), and palmoplantar pustulosis (PPP). APP is a rare entity that presents as recurring annular or figurate erythematous plaques with peripheral pustules and scales that expand centrifugally.