Histiocytic Disorders, MalignantHistiocytesLangerhans CellsSea-Blue Histiocyte SyndromeLymphocytesHistiocytosis, Langerhans-CellHistiocytosisIslets of LangerhansLymphocyte ActivationHistiocytosis, SinusHistiocytosis, Non-Langerhans-CellHistiocytic SarcomaErdheim-Chester DiseaseBipolar DisorderLymphatic DiseasesAnxiety DisordersT-LymphocytesMental DisordersLymph NodesMood DisordersSkinLymphocyte SubsetsGranuloma, Plasma CellHistiocytoma, Benign FibrousB-LymphocytesGranulomaLymphocyte CountDiagnostic and Statistical Manual of Mental DisordersEpidermisImmunohistochemistryPanniculitisLymphadenitisAntigens, CDLymphohistiocytosis, HemophagocyticSkin DiseasesEpithelioid CellsXanthomatosisCells, CulturedMalacoplakiaSpleenBiopsyImmunoenzyme TechniquesMycobacterium scrofulaceumMannose-Binding Lectins