title: Sarcoma of follicular dendritic cells with features of sinus lining cells--a new subtype of reticulum cell sarcoma?
abstract: Dendritic cell neoplasms of the World Health Organization classification comprise Langerhans cell histiocytosis, Langerhans cell sarcoma, interdigitating dendritic cell sarcoma, follicular dendritic cell sarcoma, and dendritic cell sarcoma, not otherwise specified. Several studies based on immunohistochemical and ultrastructural analysis tried to further clarify the origin of these neoplasms which are thought to derive from mesenchymal or bone marrow precursors. Lymphatic vessel endothelium hyaluronan receptor-1 (LYVE-1) was recently described as a marker for lymphatic endothelium which is expressed on normal liver blood sinusoid lining cells, spleen endothelium, activated tissue macrophages, blood vessels in the lung, endothelial cells of lymphatic sinuses, and in fibroblastic reticular cells in lymph nodes. We present a case of LYVE-1-positive reticulum cell neoplasm in an axillary lymph node. To the best of our knowledge, there has been no report about LYVE-1 expression in histiocytic or dendritic cell neoplasms so far. Due to the assumed specificity of this antibody, we propose designation of this reticulum cell sarcoma as lymphatic sinus lining cell sarcoma which might finally represent another subtype of reticulum cell sarcomas.
authors.affiliation: Department of Pathology, Reference Center for Lymph Node Pathology and Hematopathology, University Hospital of Schleswig-Holstein, Campus Luebeck, Ratzeburger Allee 160, 23538 Luebeck, Germany. krokowski@patho.mu-luebeck.de
authors.forename: Manuela
authors.initials: M
authors.lastname: Krokowski
authors.forename: Hartmut
authors.initials: H
authors.lastname: Merz
authors.forename: Christoph
authors.initials: C
authors.lastname: Thorns
authors.forename: Heinz-Wolfram
authors.initials: HW
authors.lastname: Bernd
authors.forename: Ulrika
authors.initials: U
authors.lastname: Schade
authors.forename: Agnes
authors.initials: A
authors.lastname: Le Tourneau
authors.forename: Jacques
authors.initials: J
authors.lastname: Diebold
authors.forename: Alfred Christian
authors.initials: AC
authors.lastname: Feller
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism; D020566:Dendritic Cells, Follicular / Q000378:metabolism / Q000473:pathology*; D004729:Endothelium, Lymphatic / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000378:metabolism / Q000473:pathology; D042601:Lymphatic Vessels / Q000378:metabolism / Q000473:pathology; D008228:Lymphoma, Non-Hodgkin / Q000145:classification* / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D033921:Vesicular Transport Proteins / Q000378:metabolism
chemical_list: D014408:Biomarkers, Tumor; C119248:LYVE1 protein, human; D033921:Vesicular Transport Proteins