alexa The predictive value of cerebrospinal fluid Epstein-Barr viral load as a marker of primary central nervous system lymphoma in HIV-infected persons.


Journal of Blood Disorders & Transfusion

Author(s): Corcoran C, Rebe K, van der Plas H, Myer L, Hardie DR

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Abstract BACKGROUND: The presence of Epstein-Barr virus (EBV) DNA in cerebrospinal fluid (CSF) is used as a marker of HIV-associated primary central nervous system lymphoma (PCNSL). In our setting, EBV DNA is frequently detected in the CSF of HIV-infected patients with miscellaneous neurological diseases and thus its presence is a poor predictor of PCNSL. OBJECTIVES: To determine whether quantification of EBV DNA in CSF improves its diagnostic specificity for PCNSL. STUDY DESIGN: EBV viral loads were determined on CSF samples from 55 HIV-infected patients with CNS disease. RESULTS: Twenty of the 55 patients had detectable EBV DNA in their CSF (median viral load 6120copies/ml, range 336-1,034,000copies/ml). PCNSL was confirmed in 2 patients. Their CSF EBV loads were 1,034,000 and 15,460copies/ml, respectively. Using a cut-off of 10,000copies/ml improved the specificity and positive predictive value (PPV) compared to a qualitative result for the diagnosis of PCNSL (96\% vs. 66\% and 50\% vs. 10\%, respectively). CONCLUSION: EBV DNA is commonly detected in CSF of HIV-infected patients. Quantitative PCR improves the diagnostic specificity, however, the PPV remains too low for it to be used as an isolated marker for PCNSL. This article was published in J Clin Virol and referenced in Journal of Blood Disorders & Transfusion

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