Abstract
IntroductionPrimary effusion lymphoma is a recently recognized entity of AIDS related non-Hodgkin lymphomas. Despite Africa being greatly affected by the HIV/AIDS pandemic, an extensive MEDLINE/PubMed search failed to find any report of primary effusion lymphoma in sub-Saharan Africa. To our knowledge this is the first report of primary effusion lymphoma in sub-Saharan Africa. We report the clinical, cytomorphologic and immunohistochemical findings of a patient with primary effusion lymphoma.Case presentationA 70-year-old newly diagnosed HIV-positive Ugandan African woman presented with a three-month history of cough, fever, weight loss and drenching night sweats. Three weeks prior to admission she developed right sided chest pain and difficulty in breathing. On examination she had bilateral pleural effusions.Haematoxylin and eosin stained cytologic sections of the formalin-fixed paraffin-embedded cell block made from the pleural fluid were processed in the Department of Pathology, Makerere University, College of Health Sciences, Kampala, Uganda. Immunohistochemistry was done at the Institute of Haematology and Oncology "L and A Seragnoli", Bologna University School of Medicine, Bologna, Italy, using alkaline phosphatase anti-alkaline phosphatase method. In situ hybridization was used for detection of Epstein-Barr virus.The tumor cells were CD45+, CD30+, CD38+, HHV-8 LANA-1+; but were negative for CD3-, CD20-, CD19-, and CD79a- and EBV RNA+ on in situ hybridization. CD138 and Ki-67 were not evaluable. Our patient tested HIV positive and her CD4 cell count was 127/μL.ConclusionsA definitive diagnosis of primary effusion lymphoma rests on finding a proliferation of large immunoblastic, plasmacytoid and anaplastic cells; HHV-8 in the tumor cells, an immunophenotype that is CD45+, pan B-cell marker negative and lymphocyte activated marker positive. It is essential for clinicians and pathologists to have a high index of suspicion of primary effusion lymphoma when handling HIV positive patients who have effusions without palpable tumor masses. Basic immunohistochemistry is essential for definitive diagnosis.
Highlights
Primary effusion lymphoma is a recently recognized entity of AIDS related non-Hodgkin lymphomas
A definitive diagnosis of primary effusion lymphoma rests on finding a proliferation of large immunoblastic, plasmacytoid and anaplastic cells; human herpesvirus 8 (HHV-8) in the tumor cells, an immunophenotype that is CD45 +, pan B-cell marker negative and lymphocyte activated marker positive
It is essential for clinicians and pathologists to have a high index of suspicion of primary effusion lymphoma when handling human immunodeficiency virus (HIV) positive patients who have effusions without palpable tumor masses
Summary
Since a definitive diagnosis of PEL rests on the presence of HHV-8 in the tumor cells, a lymphoproliferation of large immunoblastic, plasmacytoid and/or anaplastic cells, an immunophenotype of leucocyte common antigen CD45 positive, pan B-cell marker negative, and lymphocyte activated marker (CD 138, CD30, CD38, human leukocyte antigen DR and CD71) positive, it is essential for clinicians and pathologists to develop a high index of suspicion of PEL when handling HIV-positive patients with effusions without palpable tumor masses.
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