<unk>  are a clinically well-defined group of cutaneous syndromes characterized by infiltrates of monocytes/macrophages, as opposed to X-type histiocytoses in which the infiltrates contain Langerhans cells. Conditions included in this group are: :* Juvenile xanthogranuloma :* Benign cephalic histiocytosis :* Generalized eruptive histiocytoma :* Xanthoma disseminatum :* Progressive nodular histiocytosis :* Papular xanthoma :* Hereditary progressive mucinous histiocytosis :* Reticulohistiocytosis :* Indeterminate cell histiocytosis :* Sea-blue histiocytosis :* Erdheim–Chester disease
Non-X histiocytosis
X-type histiocytosis
Non-Langerhans cell histiocytosis
Sea-blue histiocytosis
Crystal-storing histiocytosis
Langerhans cell histiocytosis
Malignant histiocytosis
Progressive nodular histiocytosis