withmassivelymphadenopathy ④ Reticulohistiocytoma class Ⅲ Malignant histiocytic disorders ① Malignant ... lymphohistiocytosis(familial and sporadic) ② Infection-associated hemophagocytic syndrome ③ Sinushistiocytosis ... (Histiocytosis X) class Ⅱ Histiocytosis of mononuclear phagocytes other than Lagerhans cells ① Erythrophagocytic