Abstract
Persistent polyclonal B cell lymphocytosis (PPBL) is a rare lymphoproliferative disorder of unclear natural history and its potential for B cell malignancy remains unknown. We describe the case of a 39-year-old female who presented with stage IV-B large cell lymphoma 19 years after an initial diagnosis of PPBL; her disease was rapidly fatal despite intensive chemotherapy and blood stem cell transplantation. Because we had recently identified multiple bcl-2/lg gene rearrangements in blood mononuclear cells of patients with PPBL, we sought evidence of this oncogene in this particular patient: bcl-2/lg gene rearrangements were found in blood mononuclear cells but not in lymphoma cells. Owing to the possible role of Epstein–Barr virus (EBV) in the pathogenesis of PPBL, we also hypothesized our patient might have an EBV-related lymphoproliferative disorder. Despite serologies consistent with past exposure to this virus, it was not found in lymphoma cells using a sensitive polymerase chain reaction technique. We conclude that non-Hodgkin’s lymphoma may occur during the course of PPBL. However, longer follow-up in more patients will be needed in order to better clarify the risk of hematologic malignancy in patients with PPBL.
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Roy, J., Ryckman, C., Bernier, V. et al. Large cell lymphoma complicating persistent polyclonal B cell lymphocytosis. Leukemia 12, 1026–1030 (1998). https://doi.org/10.1038/sj.leu.2401040
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DOI: https://doi.org/10.1038/sj.leu.2401040
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