Alternative names Histiocytosis X Histiocytosis X syndrome Subordinate terms Hand-Schüller-Christian disease Letterer-Siwe disease Histiocytosis X, unspecified Eosinophilic Granulomatosis Langerhans Cell granulomatosis Langerhans Cell Histiocytosis, Hashimoto-Pritzker Type Langerhans Cell Histiocytosis of lung Langerhans Cell Histiocytosis, disseminated (clinical) Langerhans Cell Histiocytosis, unifocal (clinical)