Abstract
Epstein-Barr virus-infected B cells are found at high frequency in peripheral T cell lymphoma. Herein, we report a case involving excessive EBV-positive B cells accompanying peripheral T cell lymphoma, not otherwise specified in the nasopharynx masquerading as nasopharyngeal extranodal NK/T cell lymphoma. A large number of Epstein-Barr virus-infected B cells infiltrate in between CD3-positive cytotoxic tumor T cells, as if EBV was infecting tumor T cells. After chemotherapy, the T cell lymphoma population decreased, but the B cell population expanded to form EBV-positive diffuse large B cell lymphoma in the tonsils and nasopharynx. At the follow-up, bone marrow biopsy exhibited infiltration of composite peripheral T cell lymphoma, not otherwise specified, and EBV-positive diffuse large B cell lymphoma. Although this condition is rare, the cell lineage of EBV-infected cells must be confirmed when diagnosing extranodal NK/T cell lymphoma to exclude the possibility of misdiagnosis by Epstein-Barr virus-infected B cells.
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• Conceptualization: DSK, YHK
• Review of data: HNK, ESY, MJJ, CWC
• Writing—original draft: HNK, YHK.
• Writing—review and editing: DSK, CWC, YHK
The current study was approved by the institutional review board (2021GR0497) in accordance with the 1964 Helsinki declaration and its later amendments
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Kim, HN., Kim, D.S., Jeon, M.J. et al. Peripheral T cell lymphoma of the nasopharynx with expansion of EBV-positive B cells masquerading as an extranodal NK/T cell lymphoma, nasal type. Virchows Arch 481, 125–129 (2022). https://doi.org/10.1007/s00428-021-03240-0
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DOI: https://doi.org/10.1007/s00428-021-03240-0