title: Reactive histiocytosis in acute lymphoblastic leukemia and non-Hodgkin's lymphoma.
abstract: An extensive hemophagocytic syndrome in the termination of one case of pre-T acute lymphoblastic leukemia (ALL) and another case of non-Hodgkin's lymphoma (NHL), are described. Since most of the proliferating cells were mature macrophages and these cells were limited in the mononuclear phagocytic system (MPS), it was determined to be a reactive histiocytosis rather than histiocytic medullary reticulosis (HMR) or malignant histiocytosis (MH). The pathogenesis of the HMR or MH-like syndrome in these patients is discussed, and it is considered that this might be a reaction of the bacterial sepsis related to their immunosuppressed state secondary to the pre-existing malignancies and/or the cytotoxic therapy. The literature was reviewed. Based on a proposal for differential diagnosis between reactive histiocytosis and MH (or HMR), the heterogeneity of HMR-like syndrome complicating the malignancies are clarified.
authors.forename: D C
authors.initials: DC
authors.lastname: Liang
authors.forename: M L
authors.initials: ML
authors.lastname: Chu
authors.forename: C C
authors.initials: CC
authors.lastname: Shih
mesh_terms: D001344:Autopsy; D001853:Bone Marrow / Q000473:pathology; D002648:Child; D005260:Female; D006801:Humans; D007223:Infant; D007945:Leukemia, Lymphoid / Q000150:complications* / Q000473:pathology; D008198:Lymph Nodes / Q000473:pathology; D008206:Lymphatic Diseases / Q000150:complications* / Q000473:pathology; D008223:Lymphoma / Q000150:complications* / Q000473:pathology; D008264:Macrophages / Q000473:pathology; D008297:Male; D013577:Syndrome