[Erosive pustular dermatosis of the scalp after zoster ophthalmicus and trauma].

Erosive pustular dermatosis of the scalp (EPDS), first described in 1979, is a rare, chronic, pustular condition with scarring alopecia, and nonspecific histological findings. While the initial responded to steroids is good, it can be treated successfully by oral administration of zinc sulphate. Local trauma has recently been suggested to play a role in the pathogenesis of EPDS. The differential diagnosis of EPDS includes folliculitis decalvans, sterile eosinophilic pustulosis Ofuji, pustular psoriasis vulgaris, trichophytosis, Perifolliculitis capitis abscedens et suffodiens, pemphigus vulgaris and cicatricial pemphigoid. We present the cases of a 74-year-old woman suffering from EPDS following herpes zoster ophthalmicus and of a 54-year-old man in whom EPDS followed a head injury.