HistiocytesSea-Blue Histiocyte SyndromeHistiocytosisSkinHistiocytosis, Non-Langerhans-CellHistiocytosis, SinusHistiocytic SarcomaHistiocytosis, Langerhans-CellHistiocytic Disorders, MalignantErdheim-Chester DiseaseSkin DiseasesLymphatic DiseasesSkin NeoplasmsGranuloma, Plasma CellSkin AgingHistiocytoma, Benign FibrousGranulomaLymph NodesPanniculitisEpithelioid CellsXanthomatosisLymphohistiocytosis, HemophagocyticMalacoplakiaMycobacterium scrofulaceumLymphadenitisHistiocytic Necrotizing LymphadenitisBiopsyImmunoenzyme TechniquesHodgkin DiseaseSkin Physiological PhenomenaSkin TestsImmunohistochemistryLymphomaMononuclear Phagocyte SystemHistocytochemistrySkin AbsorptionRheumatoid Nodule