title: Primary nodal marginal zone B-cell lymphoma arising from more than one clonal neoplastic population.
abstract: Primary nodal marginal zone B-cell lymphoma is an uncommon monoclonal B-cell lymphoproliferative disorder. We report a case of a 79-year-old woman who presented with generalized lymphadenopathy. Histologic and immunohistochemical examinations of biopsy sections from an axillary lymph node were consistent with nodal marginal zone B-cell lymphoma. Flow cytometry analysis showed 2 distinct clonal B-cell populations expressing lambda or kappa light chain restriction. Subsequently, genomic deoxyribonucleic acid (DNA) isolated from a paraffin-embedded lymph node section was analyzed for the presence of gene rearrangements. Polymerase chain reaction (PCR) analysis of immunoglobulin heavy chain genes revealed 3 rearranged DNA bands, confirming the presence of more than one clonal B-cell population. These immunophenotypic and genotypic findings have not been previously described in association with this type of lymphoma. To our knowledge, this represents the first reported case of biclonal nodal marginal zone B-cell lymphoma.
authors: Department of Pathology, State University of New York Upstate Medical University, Syracuse, New York 13210, USA. finchc@upstate.edu
authors: C N
authors: CN
authors: Finch
authors: M
authors: M
authors: Nichols
authors: A
authors: A
authors: Shrimpton
authors: D
authors: D
authors: Liu
authors: R E
authors: RE
authors: Hutchison
mesh_terms: D000368:Aged; D015703:Antigens, CD / Q000032:analysis; D018951:Antigens, CD20 / Q000032:analysis; D000944:Antigens, Differentiation, B-Lymphocyte / Q000032:analysis; D015815:Cell Adhesion Molecules; D002999:Clone Cells; D005260:Female; D005434:Flow Cytometry; D015322:Gene Rearrangement, B-Lymphocyte / Q000235:genetics*; D006801:Humans; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D016130:Immunophenotyping; D037102:Lectins; D016393:Lymphoma, B-Cell / Q000235:genetics / Q000276:immunology / Q000473:pathology*; D016133:Polymerase Chain Reaction; D051918:Sialic Acid Binding Ig-like Lectin 2
chemical_list: D015703:Antigens, CD; D018951:Antigens, CD20; D000944:Antigens, Differentiation, B-Lymphocyte; C497867:CD22 protein, human; D015815:Cell Adhesion Molecules; D007143:Immunoglobulin Heavy Chains; D037102:Lectins; D051918:Sialic Acid Binding Ig-like Lectin 2