<unk>  is a cutaneous condition that may occur as a familial inherited syndrome or as an acquired secondary or systemic infiltrative process.
Sea-blue histiocytosis
Crystal-storing histiocytosis
X-type histiocytosis
Langerhans cell histiocytosis
Malignant histiocytosis
Non-X histiocytosis
Non-Langerhans cell histiocytosis
Langerhans cell sarcoma