A Feasible Flowchart to Screen EBV-Positive Diffuse Large B Cell Lymphoma of the elderly: A Molecular Approach
Keywords:
Epstein-Barr virus (EBV), EBV-positive diffuse large B cell lymphoma of the elderly, Diffuse large B cell lymphoma (DLBCL), EBER in situ hybridization (EBER-ISH), Quantitative real time PCR (Q-PCR).Abstract
Background: Epstein Barr Virus-positive diffuse large B cell lymphoma of the elderly (DLBCL-EBV+-e), initially described in 2003, is a provisional entity in the 4th edition of the World Health Organization (WHO) Classification of tumors of hematopoietic and lymphoid tissues and is defined as an EBV+ monoclonal large B cell proliferation that occurs in patients >50 years of age and in whom there is no known immunodeficiency or history of lymphoma. It is associated with a poor prognosis but could be treated with the association of novel therapeutic approaches. EBER in situ hybridization (EBER-ISH) Â is the gold standard assay for defining a tumor as EBV-related, however there are no uniform criteria for the percentage of EBV-positive cells in DLBCL-EBV+-e.
Methods: We applied to Formalin Fixed Paraffin Embedded (FFPE) tissue of 43 novel DLBCL over 50 years Q-PCR for the detection of viral DNA in concert with EBER-ISH.
Result: Only one case was defined as true DLBCL-EBV+-e being Q-PCR positive  with a value of log EBV DNA/105 cells ≥ 6 and EBER-ISH positive.
Conclusion: In the current study we applied to FFPE tissue of DLBCL-EBV+-e a reliable and feasible Q-PCR/EBER-ISH combined protocol for the screening of EBV status. Our protocol could help to better identify the DLBCL-EBV+-e patients eligible for novel therapeutic approaches.
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Copyright (c) 2016 Simona Ferrari, Luca Caschera, Giuseppe Deda, Michelina Maria Carla Amato, Ombretta Annibali, Carla Rabitti, Anna Crescenzi, Tommasangelo Petitti, Giuseppe Avvisati, Andrea Onetti Muda, Francesca Zalfa, Antonella Bianchi
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