title: Epstein-Barr virus negative clonal plasma cell proliferations and lymphomas in peripheral T-cell lymphomas: a phenomenon with distinctive clinicopathologic features.
abstract: Clonal B-cell populations have been described in peripheral T-cell lymphomas (PTCL) as secondary Epstein-Barr virus (EBV) driven B-cell expansions that may evolve to an overt B-cell lymphoma. EBV-negative B-cell proliferations associated with T-cell lymphomas are uncommon and not well characterized. We studied 15 patients who developed an EBV-negative B-cell proliferation or malignant lymphoma associated with PTCL. The T-cell tumors were 8 PTCL, not otherwise specified, 4 angioimmunoblastic T-cell lymphomas, and 3 cutaneous PTCL. The B-cell component was intermingled with the PTCL in all patients and it was classified as clonal/monotypic plasma cell proliferation in 8 lesions, clonal/monotypic large B-cell proliferation in 4 patients, and B-cell lymphoma with plasmacytic/plasmablastic differentiation in 3 patients. Two patients had 2 clonally unrelated plasma cell proliferations associated with the same PTCL. All cases showed cytoplasmic Ig light chain restriction. Clonal IgH and T-cell receptor rearrangements were detected in 11/12 and 11/13 cases examined, respectively. EBV, cytomegalovirus, and HHV-8 were not observed in any of the examined cases. Sequential samples in 7 patients showed persistence of the PTCL and the B-cell component in 4, the PTCL without the B-cell lymphoma in 2, and progression of the B-cell neoplasm in 1. Patients followed an aggressive clinical course similar to conventional PTCL. In conclusion, EBV-negative clonal or mononotypic B-cell proliferations in patients with PTCL present with a spectrum of lesions ranging from plasma cell proliferations to overt lymphomas with plasmacytic/plasmablastic features. The distinctive features of these patients suggest that these lesions represent a specific phenomenon in PTCL.
authors.affiliation: Hematopathology Section, Laboratory of Pathology, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer, University of Barcelona, Barcelona, Spain.
authors.forename: Olga
authors.initials: O
authors.lastname: Balagué
authors.forename: Antonio
authors.initials: A
authors.lastname: Martínez
authors.forename: Luís
authors.initials: L
authors.lastname: Colomo
authors.forename: Ester
authors.initials: E
authors.lastname: Roselló
authors.forename: Adriana
authors.initials: A
authors.lastname: Garcia
authors.forename: Mónica
authors.initials: M
authors.lastname: Martínez-Bernal
authors.forename: Antonio
authors.initials: A
authors.lastname: Palacín
authors.forename: Kai
authors.initials: K
authors.lastname: Fu
authors.forename: Dennis
authors.initials: D
authors.lastname: Weisenburger
authors.forename: Dolors
authors.initials: D
authors.lastname: Colomer
authors.forename: Jerome S
authors.initials: JS
authors.lastname: Burke
authors.forename: Roger A
authors.initials: RA
authors.lastname: Warnke
authors.forename: Elías
authors.initials: E
authors.lastname: Campo
mesh_terms: D000293:Adolescent; D000368:Aged; D000369:Aged, 80 and over; D002454:Cell Differentiation; D049109:Cell Proliferation; D002999:Clone Cells / Q000473:pathology / Q000821:virology; D003587:Cytomegalovirus; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D015322:Gene Rearrangement, B-Lymphocyte; D015329:Gene Rearrangement, T-Lymphocyte; D004854:Herpesvirus 4, Human; D019288:Herpesvirus 8, Human; D006801:Humans; D016393:Lymphoma, B-Cell / Q000235:genetics / Q000473:pathology* / Q000821:virology; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics / Q000473:pathology* / Q000821:virology; D016411:Lymphoma, T-Cell, Peripheral / Q000235:genetics / Q000473:pathology* / Q000821:virology; D008297:Male; D008875:Middle Aged; D010950:Plasma Cells / Q000473:pathology* / Q000821:virology