Abstract
Plasmablastic lymphoma (PBL) is a rare acquired immunodeficiency syndrome-associated non-Hodgkin’s lymphoma (AIDS-NHL), with predilection for the mucosa of oral cavity. It usually has a plasmablastic morphology, expressing plasma cell-associated antigens with weak or absent expression of B-cell-associated markers. To further define the immunophenotypic and molecular genetics of these tumors, we investigated two cases of plasmablastic lymphomas of the head and neck for c-myc gene rearrangement and immunoglobulin heavy chain (IgVH) hypermutation status. For the first time we report a case of AIDS-related PBL that, by fluorescence in situ hybridization (FISH), shows a c-myc gene rearrangement. Although current literature suggests that most cases of c-myc gene rearranged AIDS-NHL are Burkitt’s lymphoma, our case has an immunophenotype characteristic for PBL. In this case, IgVH hypermutation analysis showed a somatic hypermutation, indicative of germinal center transit. The concurrent B-cell immunophenotype of BCL-6−/CD138+/MUM-1+ also suggests a post-germinal center B-cell origin of this lymphoma. The immunophenotype of our second case (BCL-6−/CD138+/MUM-1+) also suggests a post-germinal center B-cell origin. However, IgVH hypermutation analysis was not possible in this case.
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Hassan, A., Kreisel, F., Gardner, L. et al. Plasmablastic Lymphoma of Head and Neck: Report of Two New Cases and Correlation with c-myc and IgVH Gene Mutation Status. Head and Neck Pathol 1, 150–155 (2007). https://doi.org/10.1007/s12105-007-0006-5
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DOI: https://doi.org/10.1007/s12105-007-0006-5