Childhood Self‐Healing Histiocytosis X

: A 6-month-old boy had histiocytosis X limited to the skin and oral mucosa. which regressed spontaneously over a period of six months. We review the subsets of autoinvolutive histiocytosis X with special emphasis on the dermatologic manifestations. Childhood self-healing histiocytosis X is a benign condition that should be differentiated from self-healing reticulohistiocytosis (Hashimoto-Pritzker type).