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- W2019443835 abstract "Reactive immunoblastic proliferations can histologically mimic classical Hodgkin lymphoma (CHL), and show diffuse CD30 expression in large cells. The lack of expression of CD15 in a subset of CHL further complicates their separation from immunoblastic proliferations. Loss of expression of B-cell transcription factors is frequently exploited in making a diagnosis of CHL; however, the staining patterns of B-cell transcription factors in immunoblastic proliferations have not been extensively studied. Thirty-three cases of reactive immunoblastic proliferations were evaluated using a panel of immunohistochemistry for CD30, CD15, CD20, CD3, κ, λ, CD45RB, MUM1, PAX5, OCT2, and BOB.1, as well as Epstein-Barr virus (EBV)/EBV-encoded ribonucleic acid in situ hybridization. A newly developed dual-color chromogenic in situ hybridization technology for detection of κ/λ mRNAs was also used. The majority of immunoblasts expressed CD30 in 14 of 33 (42%) cases; none expressed CD15. Loss or weak expression of at least 1 transcription factor in B immunoblasts, most commonly PAX5, was noted in 24 of 29 (83%) cases. A polytypic light chain expression pattern was detected by immunohistochemistry in 14 of 22 (63.6%) cases and by dual-color chromogenic in situ hybridization in 9 of 10 (90%) cases studied. EBV-encoded ribonucleic acid was detected in 8 of 33 (24.2%) cases, 5 of which were clinically unrelated to infectious mononucleosis. We conclude that B-cell transcription factors can show loss or weak expression in a significant proportion of reactive immunoblastic proliferations, and, therefore, staining for B-cell transcription factors together with CD30 should be interpreted with caution before a diagnosis of CHL is made." @default.
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- W2019443835 date "2014-12-01" @default.
- W2019443835 modified "2023-09-30" @default.
- W2019443835 title "Variable Expression of B-cell Transcription Factors in Reactive Immunoblastic Proliferations" @default.
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- W2019443835 doi "https://doi.org/10.1097/pas.0000000000000266" @default.
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