[Acute juvenile pityriasis rubra pilaris in a 2-year-old child].

Pityriasis rubra pilaris (PRP) is a rare idiopathic erythematosquamous disorder. Griffiths proposed five clinical and prognostic forms: (1) classic adult, (2) atypical adult, (3) classic juvenile, (4) circumscribed juvenile and (5) atypical juvenile. A 2 1/2 year old boy presented with type 3 PRP; as is typical, the skin eruption was preceded by an infectious disorder. Although type 3 PRP normally shows spontaneous resolution after several months to years, our young patient had a severe and protracted course, only responding to systemic retinoids.