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- W15966455 abstract "Abstract Recent evidence has shown that most nasal lymphomas (NL) are associated with a T-cell phenotype and are thus called nasal T-cell lymphomas (NTCL), but little information is available about the T-cell receptor (TCR) expression. The presence of Epstein-Barr virus (EBV) genome has been recently reported in NTCL in Oriental populations in which NL and EBV-associated tumors are more common and in occasional Occidental cases. This prompted us to investigate lymphoma biopsies from 7 non- Oriental patients with NTCL for the expression of natural killer (NK) and T-cell antigens, including TCR proteins, for the presence of EBV- encoded latent membrane protein (LMP) using immunohistochemistry and for the presence of EBV DNA and Epstein-Barr early region (EBER) RNA using in situ hybridization (ISH). Six cases displayed a CD3-, TCR alpha beta-, TCR gamma delta-, CD2+, CD7+, CD5-, CD4-, CD8-, CD56+ phenotype, suggesting that these tumors may be peripheral T-cell lymphomas (PTCL) with extensive loss of T-cell antigens and expression of the NK-cell (CD56) antigen or, alternatively, NK-cell neoplasias. The remaining case was a gamma delta PTCL, as shown by the CD3+, TCR gamma delta+ phenotype and the biallelic gamma and delta TCR gene rearrangements. Using ISH, EBER RNA transcripts were detected in tumor cells in all cases and EBV DNA was shown in the 6 tested cases. In all cases, tumor cells expressed LMP. These findings support the concept that NTCL constitute a distinct group of lymphomas that, in addition to their peculiar clinical features, exhibit an unusual TCR “silent” CD56+ or TCR gamma delta+ phenotype and harbor the EBV. In view of the LMP transforming potential, these data suggest that EBV may play a role in the pathogenesis of NTCL." @default.
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- W15966455 date "1993-05-15" @default.
- W15966455 modified "2023-09-29" @default.
- W15966455 title "Nasal T-cell lymphoma: a clinicopathologic entity associated with peculiar phenotype and with Epstein-Barr virus" @default.
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- W15966455 doi "https://doi.org/10.1182/blood.v81.10.2688.2688" @default.
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