title: HHV-8-associated T-cell lymphoma in a lymph node with concurrent peritoneal effusion in an HIV-positive man.
abstract: Primary effusion lymphoma (PEL) is an uncommon large cell lymphoma, usually seen in human immunodeficiency virus (HIV)-infected patients. PEL is characterized by various clinical, histomorphologic, and immunophenotypical features, and is associated with the human herpes virus 8 (HHV-8). PEL may present as either a body cavity-based lymphomatous effusion or a solid tumor mass. Most so-called "solid PEL" usually have an extranodal location; exceptionally rarely, they occur in lymph nodes. The majority of PEL consist of malignant cells of B-cell genotype; seldom they are of T-cell origin. We report a rare case of HHV-8-associated "solid PEL" of T-cell type in a 41-year-old HIV-seropositive man with a concomitant peritoneal effusion. The T-cell lymphoma was diagnosed on the basis of morphologic, immunophenotypic, and molecular findings of a lymph node biopsy. The tumor cells strongly expressed CD45R0, CD7, CD43, MUM1/IRF4, CD30, HHV-8, and EBER, and demonstrated a clonal rearrangement of T-cell receptor-gamma chain gene. The following case provides another example of a lymph node-based "solid" PEL, demonstrating the variety within the spectrum of HHV-8-associated lymphoma.
authors.affiliation: Department of Pathology, Charité-University Medicine, Campus Benjamin Franklin, Berlin, Germany. sarah.coupland@charite.de
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Coupland
authors.forename: Frederic
authors.initials: F
authors.lastname: Charlotte
authors.forename: George
authors.initials: G
authors.lastname: Mansour
authors.forename: Karim
authors.initials: K
authors.lastname: Maloum
authors.forename: Michael
authors.initials: M
authors.lastname: Hummel
authors.forename: Harald
authors.initials: H
authors.lastname: Stein
mesh_terms: D000328:Adult; D001202:Ascitic Fluid / Q000473:pathology*; D014408:Biomarkers, Tumor / Q000032:analysis; D002999:Clone Cells; D015334:Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor; D006679:HIV Seropositivity; D006566:Herpesviridae Infections / Q000150:complications / Q000378:metabolism / Q000473:pathology*; D019288:Herpesvirus 8, Human / Q000302:isolation & purification / Q000502:physiology; D006801:Humans; D008198:Lymph Nodes / Q000378:metabolism / Q000473:pathology*; D016411:Lymphoma, T-Cell, Peripheral / Q000378:metabolism / Q000473:pathology* / Q000821:virology; D008297:Male
chemical_list: D014408:Biomarkers, Tumor