Epstein-Barr virus-associated T-cell lymphoma in a renal transplant patient.
Posttransplant lymphoproliferative disorders in organ allograft recipients are most commonly of B cell origin, whereas T cell lymphomas are rarely described. We report a case of T cell immunoblastic large cell lymphoma associated with Epstein-Barr virus (EBV) that occurred in a recipient of a cadaveric renal transplant 7 years posttransplantation. On paraffin immunophenotyping, none of the neoplastic cells stained with the T cell-associated markers used, but did show strong CD30 expression. Flow cytometric studies revealed a predominance of T cells without definite evidence of T cell neoplasia. Frozen section immunophenotyping studies revealed a T cell phenotype with aberrant expression, and genotypic studies demonstrated T cell receptor beta gene rearrangement with germline configuration of immunoglobulin heavy chain and kappa light chain genes, confirming a T lineage. EBV-encoded RNA transcripts were demonstrated within the neoplastic cells by in situ hybridization. Southern blot analysis using probes derived from the terminal repeat region of the virus detected a single restriction band indicating a clonal population. We believe this is the first case of a posttransplant T cell lymphoma in which the EBV genome has been demonstrated. This case also illustrates the pitfalls of paraffin immunophenotyping in the diagnosis of T cell lymphoma.
Department of Pathology, University of Texas Medical Branch, Galveston 77555.
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Kumar
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Kumar
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Kingma
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Jaffe
D000328:Adult; D015139:Blotting, Southern; D004854:Herpesvirus 4, Human / Q000302:isolation & purification*; D006801:Humans; D016130:Immunophenotyping; D017403:In Situ Hybridization; D016030:Kidney Transplantation / Q000009:adverse effects*; D008297:Male; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000209:etiology* / Q000276:immunology / Q000473:pathology*; D014181:Transplantation Immunology; D014412:Tumor Virus Infections / Q000209:etiology* / Q000276:immunology / Q000473:pathology*