X-type histiocytosis

X-type histiocytoses are a clinically well-defined group of cutaneous syndromes characterized by infiltrates of Langerhans cells, as opposed to Non-X histiocytosis in which the infiltrates contain monocytes/macrophages. Conditions included in this group are:


 * Congenital self-healing reticulohistiocytosis
 * Langerhans cell histiocytosis