title: [Malignant histiocytosis: a study on clinicopathological features and cell origin].
abstract: Thirty-one autopsy cases previously diagnosed as malignant histiocytosis (MH) were studied by means of immunohistochemical staining. Antibodies detecting the formalin resistant epitopes on T-cells, B-cells and those of histiocyte/monocyte origin were used. It was shown that the malignant histiocytes reacted only to the cell markers derived from histiocyte/monocyte, and only a part of lymphocytes showed positive reaction to the T and B cell markers. It is suggested that the histiocyte/monocyte lineage is the possible origin of the malignant proliferating cells in MH. The clinicopathological features and the differentiation of MH from familial erythrophagocytic lymphohistiocytosis, virus-associated hemophagocytic syndrome and malignant lymphoma are described. The pathogenesis, the causes of death and the points for attention in the treatment of MH are also discussed.
authors.affiliation: Department of Pathology, Beijing Children's Hospital.
authors.forename: P J
authors.initials: PJ
authors.lastname: Li
mesh_terms: D002648:Child; D002675:Child, Preschool; D005260:Female; D006644:Histiocytes / Q000473:pathology; D054747:Histiocytic Sarcoma / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D008297:Male; D009000:Monocytes / Q000473:pathology