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Sinonasal lymphomas of T cell or natural killer cell (T/NK cell) phenotype represent a subset of extranodal head and neck lymphomas. T/NK cell sinonasal lymphomas have been described in diverse geographic settings, including China, Japan, Peru, Northern Europe, and North America. The frequency of these lymphomas is highly dependent on the geographic location in which they occur, their incidence being...
Simian virus 40 (SV40) is an oncogenic DNA virus, which is an emergent pathogen implicated in some human malignancies, including B-cell lymphomas. As with other malignancies that occur during immunosuppression, it is hypothesized that SV40 infections may be associated with some posttransplant lymphoproliferative disorders (PTLDs). Specimens were tested initially for Epstein-Barr virus (EBV) by in...
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