Refractory palmoplantar pustulosis succesfully treated with apremilast.

Palmoplantar pustulosis is a chronic inflammatory disease which characterized by a eruption of sterile pustules on the palms and soles. Apremilast is an oral phosphodiesterase-4 inhibitor which is approved for the treatment of chronic plaque psoriasis and psoriatic arthritis. However, no clinical trial has been performed to confirm the efficacy of apremilast for palmoplantar pustulosis yet. Moreover, there are very few cases of this disease treated with apremilast. Herein, we describe a case of a refractory palmoplantar pustulosis succesfully treated with apremilast.