Histiocytosis, Langerhans-Cell [Disease/Finding] Langerhans-Cell Histiocytosis Schueller-Christian Disease N0000001544 Letterer-Siwe Disease Hand-Schüller-Christian Disease D006646 Histiocytosis, Langerhans-Cell Histiocytosis, Generalized 190955000 C0019621 C3266 Histiocytosis-X 65399007 989741 Histiocytosis X Langerhans-Cell Granulomatosis Histiocytosis, Langerhans-Cell A group of disorders resulting from the abnormal proliferation of and tissue infiltration by LANGERHANS CELLS which can be detected by their characteristic Birbeck granules (X bodies), or by monoclonal antibody staining for their surface CD1 ANTIGENS. Langerhans-cell granulomatosis can involve a single organ, or can be a systemic disorder. Hand-Schueller-Christian Disease M0010406 Hand-Schueller-Christian Syndrome 190956004 Hand-Schüller-Christian Syndrome Histiocytosis [Disease/Finding] Lung Diseases, Interstitial [Disease/Finding]