title: Lymphoma with multi gene rearrangement on the level of immunoglobulin heavy chain, light chains, and T-cell receptor beta chain.
abstract: A unique case with diffuse mixed malignant lymphoma was investigated for gene rearrangement on the level of T-cell receptor (TCR), heavy chain immunoglobulin (Ig), and both light chains. Cell phenotype was examined with immunofluorescence techniques using antibodies against surface immunoglobulins (SIg) and the kappa and lambda light chains. Monoclonal antibodies were used against CD3, CD4, CD5, CD8, CD10, CD19, CD22, HLA-DR, and TdT. Gene rearrangement analysis for monoclonality determination was carried out with restricted DNA (EcoR I and Hind III) hybridized with one of the following 32P-labelled probes: T-cell receptor (TCR beta), immunoglobulin heavy chain (JH), k light chain, and lambda light chain. Phenotyping of the cell population from the excised lymph node (LN) revealed the presence of 66% B-cells and 35% T-cells. Most of the B cells (94%) expressed mu heavy chain only. Expression of both light chains was negligible (k = 7% and lambda = 2%). Gene rearrangement, which indicates monoclonality, was positive on the level of TCR, Ig heavy chain, and both light chains. The data obtained suggests a neoplastic transforming event in lymphoid stem cells, which preceded the subsequent differentiation process into either B or T lymphoma.
authors.affiliation: Laboratories of Molecular Biology and Hematology, Sapir Medical Centre, Sackler School of Medicine, Tel Aviv University, Kfar Saba, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Klein
authors.forename: R
authors.initials: R
authors.lastname: Zemer
authors.forename: Y
authors.initials: Y
authors.lastname: Manor
authors.forename: H
authors.initials: H
authors.lastname: Shapiro
authors.forename: M
authors.initials: M
authors.lastname: Cordoba
authors.forename: I
authors.initials: I
authors.lastname: Spivak
authors.forename: J
authors.initials: J
authors.lastname: Radnay
mesh_terms: D000368:Aged; D015703:Antigens, CD / Q000276:immunology; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D015139:Blotting, Southern; D002999:Clone Cells; D004273:DNA, Neoplasm / Q000032:analysis; D005260:Female; D015326:Gene Rearrangement, B-Lymphocyte, Heavy Chain / Q000235:genetics*; D015328:Gene Rearrangement, B-Lymphocyte, Light Chain / Q000235:genetics*; D015333:Gene Rearrangement, beta-Chain T-Cell Antigen Receptor / Q000235:genetics*; D005803:Genes, Immunoglobulin; D006801:Humans; D008198:Lymph Nodes / Q000737:chemistry / Q000473:pathology; D008223:Lymphoma / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D010641:Phenotype
chemical_list: D015703:Antigens, CD; D004273:DNA, Neoplasm