title: AIDS-related lymphoma in Brazil. Histopathology, immunophenotype, and association with Epstein-Barr virus.
abstract: The occurrence of malignant lymphoma is an increasingly important cause of morbidity and mortality in AIDS patients. The incidence of AIDS-related lymphoma in some developing countries such as Brazil is increasing as the survival of HIV infection has improved. Although there is a clear association between several types of immunodeficiency-related lymphomas and Epstein-Barr virus (EBV), the association of EBV infection in AIDS-related lymphoma in Brazil, where the incidence of AIDS is high, is unknown. Formalin-fixed, paraffin-embedded tissue from 24 cases of AIDS-related lymphoma in Brazil were analyzed for morphologic classification, immunophenotype, and EBV association using in situ hybridization studies with an EBV-EBER1 biotinylated probe. Twenty cases of AIDS-related lymphoma were classified as non-Hodgkin's lymphoma and four cases were Hodgkin's disease. Eleven non-Hodgkin's lymphomas were classified as diffuse large cell type, five cases were small non-cleaved cell, Burkitt-type, and four cases were large cell immunoblastic non-Hodgkin's lymphoma. Eighteen cases were of B-cell phenotype; one was a T-cell lymphoma, and one was classified as null. Epstein-Barr virus (EBV) was demonstrated in the majority of tumor cells of 11 of 20 (55%) of the cases non-Hodgkin's lymphomas and in 3 of 4 (75%) cases of Hodgkin's disease. AIDS-related lymphomas in Brazil are usually of large cell/immunoblastic type, but Hodgkin's disease is also seen. Both non-Hodgkin's lymphoma and Hodgkin's disease are often associated with EBV infection. The non-Hodgkin's lymphoma is predominantly of B-cell phenotype.
authors.affiliation: Department of Pathology, State University of São Paulo-Botucatu, Brazil.
authors.forename: C E
authors.initials: CE
authors.lastname: Bacchi
authors.forename: M M
authors.initials: MM
authors.lastname: Bacchi
authors.forename: S H
authors.initials: SH
authors.lastname: Rabenhorst
authors.forename: F A
authors.initials: FA
authors.lastname: Soares
authors.forename: L E
authors.initials: LE
authors.lastname: Fonseca
authors.forename: H S
authors.initials: HS
authors.lastname: Barbosa
authors.forename: L M
authors.initials: LM
authors.lastname: Weiss
authors.forename: A M
authors.initials: AM
authors.lastname: Gown
mesh_terms: D000328:Adult; D001938:Brazil; D005260:Female; D006566:Herpesviridae Infections / Q000150:complications* / Q000821:virology; D004854:Herpesvirus 4, Human / Q000302:isolation & purification*; D006689:Hodgkin Disease / Q000276:immunology / Q000473:pathology / Q000821:virology; D018451:Homosexuality, Male; D006801:Humans; D016130:Immunophenotyping; D017403:In Situ Hybridization; D008198:Lymph Nodes / Q000473:pathology; D016483:Lymphoma, AIDS-Related / Q000235:genetics / Q000276:immunology / Q000473:pathology* / Q000821:virology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000276:immunology / Q000473:pathology / Q000821:virology; D008228:Lymphoma, Non-Hodgkin / Q000276:immunology / Q000473:pathology / Q000821:virology; D008297:Male; D008875:Middle Aged; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000276:immunology / Q000473:pathology / Q000821:virology; D012367:RNA, Viral / Q000032:analysis; D019966:Substance-Related Disorders; D014412:Tumor Virus Infections / Q000150:complications* / Q000821:virology
chemical_list: D012367:RNA, Viral