A clinical, molecular and cytogenetic study of 12 cases of human herpesvirus 8 associated primary effusion lymphoma in HIV-infected patients

The Hematology Journal : the Official Journal of the European Haematology Association
E BoulangerE Oksenhendler

Abstract

Primary effusion lymphoma is a rare type of B-cell lymphoproliferative disorder which is mainly observed in patients with HIV infection. Lymphomatous cells bridge features of immunoblastic and anaplastic cells with a non-B non-T phenotype and are characterized by the presence of the human herpesvirus 8 genome. We report on the retrospective analysis of 12 cases. : Twelve HIV-infected patients with serous effusions containing large HHV8(+) lymphomatous cells were extensively evaluated to disclose associated visceral involvement. Clonality was assessed by IgH gene rearrangement PCR analysis (n = 11) or Southern blot (n = 1). EBV and HHV8 DNA sequences were detected by PCR analysis. Cytogenetics studies were performed in seven cases using RHG-banding. Extraserous localizations of lymphoma were present in six cases (50%): mediastinal (n = 2), mesenteric (n = 2), pancreatic (n = 1), and bone marrow involvement (n = 1). A monoclonal rearrangement of IgH genes was demonstrated in six cases, an oligoclonal pattern in one, whereas no clonality could be detected in five. High HHV8 copy numbers were demonstrated in all effusion fluids, with EBV-co-infection in all cases but one. Cytogenetic analysis displayed a complex karyotype in all ca...Continue Reading

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