<unk>  refers to a family of histiocytosis characterized by the absence of Langerhans<unk> s. Many manifest cutaneously. The spectrum of<unk>  include: * Benign cephalic histiocytosis * Generalized eruptive histiocytoma * Indeterminate<unk>  histiocytosis * Juvenile xanthogranuloma * Progressive nodular histiocytoma * Necrobiotic xanthogranuloma * (Giant<unk>  Reticulohistiocytoma * Multicentric reticulohistiocytosis * Rosai–Dorfman disease * Xanthoma disseminatum * Kikuchi disease * Erdheim–Chester disease.
Non-Langerhans cell histiocytosis
Crystal-storing histiocytosis
Non-X histiocytosis
X-type histiocytosis
Malignant histiocytosis
Sea-blue histiocytosis
Progressive nodular histiocytosis
Langerhans cell sarcoma