title: The histopathologic and molecular basis for the diagnosis of histiocytic sarcoma and histiocyte-associated lymphoma of mice.
abstract: Histiocytic sarcoma (HS) and histiocyte-associated lymphoma (HAL) of mice are difficult to distinguish histologically. Studies of multiple cases initially diagnosed as HS or HAL allowed us to define HS as round, fusiform, or mixed cell types that were F4/80+, Mac-2+, and PAX5-; that lacked markers for other sarcomas; and that had immune receptor genes in germline configuration. Two other subsets had clonal populations of lymphocytes. The first, HAL, featured malignant lymphocytes admixed with large populations of normal-appearing histiocytes. The second appeared to be composites of lymphoma and HS. Several cases suggestive of B myeloid-lineage plasticity were also observed.
authors.affiliation: Laboratory of Immunopathology, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA.
authors.forename: X
authors.initials: X
authors.lastname: Hao
authors.forename: T N
authors.initials: TN
authors.lastname: Fredrickson
authors.forename: S K
authors.initials: SK
authors.lastname: Chattopadhyay
authors.forename: W
authors.initials: W
authors.lastname: Han
authors.forename: C-F
authors.initials: CF
authors.lastname: Qi
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: J M
authors.initials: JM
authors.lastname: Ward
authors.forename: J W
authors.initials: JW
authors.lastname: Hartley
authors.forename: H C
authors.initials: HC
authors.lastname: Morse
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000378:metabolism; D005260:Female; D037502:Galectin 3 / Q000378:metabolism; D054747:Histiocytic Sarcoma / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D008223:Lymphoma / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D008297:Male; D051379:Mice; D009113:Muramidase / Q000378:metabolism; D051757:PAX5 Transcription Factor / Q000378:metabolism; D012376:Rodent Diseases / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology
chemical_list: D000943:Antigens, Differentiation; D014408:Biomarkers, Tumor; D037502:Galectin 3; D051757:PAX5 Transcription Factor; C497282:Pax5 protein, mouse; C036763:monocyte-macrophage differentiation antigen; D009113:Muramidase
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