Acrodermatitis continua of Hallopeau (ACH) was first described in 1890 by Henri Hallopeau.1 He had observed a single patient with an undulating but recalcitrant pustular destruction of the fingertips and toes.1 Nowadays, this condition is considered a subtype of localized pustular psoriasis.
Muggli D, Maul J, Anzengruber F, Fopp MW, Navarini AA. Secukinumab for Acrodermatitis Continua of Hallopeau. JAMA Dermatol. Published online January 25, 2017. doi:10.1001/jamadermatol.2016.5059