HistiocytesEpithelial CellsSea-Blue Histiocyte SyndromeHistiocytosisHistiocytosis, Non-Langerhans-CellHistiocytosis, SinusHistiocytic SarcomaHistiocytosis, Langerhans-CellHistiocytic Disorders, MalignantErdheim-Chester DiseaseLymphatic DiseasesEpitheliumEpithelioid CellsGranuloma, Plasma CellHistiocytoma, Benign FibrousGranulomaImmunohistochemistryLymph NodesPanniculitisLymphohistiocytosis, HemophagocyticMalacoplakiaXanthomatosisCell LineLymphadenitisMycobacterium scrofulaceumRespiratory MucosaImmunoenzyme TechniquesHistiocytic Necrotizing LymphadenitisCells, CulturedIntestinal MucosaBiopsyBronchiHistocytochemistryHodgkin DiseaseMicroscopy, ElectronLymphomaLungMononuclear Phagocyte SystemEpithelium, CornealRheumatoid NoduleRNA, MessengerStaining and LabelingMammary Glands, AnimalSkin Diseases