title: [Hashimoto-Pritzker self-healing reticulohistiocytosis and congenital histiocytosis].
abstract: BACKGROUND
  Congenital histiocytosis is divided into four entities differing in their clinical and histological features and prognosis. Early, accurate diagnosis is essential for treatment.
  
  
  METHODS
  Seven cutaneous nodules were seen in a male neonate. One of these nodules was biopsied on the 7th day of life; it showed the typical findings of Hashimoto-Pritzker reticulohistiocytosis by optical and electron microscopy using immunological markers. The nodules spontaneously disappeared after a few months.
  
  
  CONCLUSIONS
  Congenital forms of histiocytosis must be accurately characterized. Hashimoto-Pritzker reticulohistiocytosis is a benign and self-healing disease restricted to the skin, while the Letterer-Siwe disease has a completely different course and treatment.
authors.affiliation: Service de dermatopathologie, CHU du Sart Tilman, Liège, Belgique.
authors.forename: P
authors.initials: P
authors.lastname: Paquet
authors.forename: T
authors.initials: T
authors.lastname: Hermanns-Lê
authors.forename: G E
authors.initials: GE
authors.lastname: Piérard
mesh_terms: D006801:Humans; D007231:Infant, Newborn; D008206:Lymphatic Diseases / Q000145:classification / Q000151:congenital* / Q000473:pathology; D008297:Male; D012075:Remission, Spontaneous; D012878:Skin Neoplasms / Q000145:classification / Q000151:congenital* / Q000473:pathology
vernacular_title: Réticulohistiocytose auto-involutive de Hashimoto-Pritzker et les histiocytoses congénitales.