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  • Title: Transformation from follicular lymphoma to high-grade B-cell lymphoma/leukemia with additional t(2;8)(p12;q24), with inverse expressions of c-MYC and BCL-2, and light-chain switch.
    Author: Mannouji K, Tasaka T, Akiyama T, Irei I, Sano F, Matsuhashi Y, Wada H, Tohyama K, Sugihara T, Sadahira Y.
    Journal: Pathol Int; 2009 Apr; 59(4):261-4. PubMed ID: 19351371.
    Abstract:
    Transformation from follicular lymphoma (FL) to high-grade B-cell lymphoma/leukemia (BLL) has been reported in patients with additional translocations involving the c-MYC gene. The previously reported cases were related to t(8;14) and t(8;22) but not to t(2;8). Herein is reported an FL that terminated in BLL following additional t(2;8). In accordance with previous reports, increased expression of c-MYC was observed in the present case but, interestingly, BCL-2 expression was inversely decreased after the transformation. In addition, the cell-surface immunoglobulin light-chain of lymphoma cells was initially kappa type and was then gradually replaced with the lambda type after transformation. Downregulation of BCL-2 and light-chain switch have rarely been reported in previous cases of FL transformation involving c-MYC, suggesting that additional t(2;8) translocation may play a role in these events.
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