title: Surface immunoglobulin-positive lymphoblastic lymphoma. A report of three cases.
abstract: Lymphoblastic lymphomas (LBL) are a morphologically homogeneous group of non-Hodgkin's lymphomas which are indistinguishable in tissue sections from acute lymphoblastic leukemia (ALL). Although initial immunologic studies of LBL suggested that these lymphomas are of the T-cell phenotype, investigations have recently described patients with LBL having pre-B-cell, "common" ALL, and natural killer cell phenotypes. The authors recently reported detailed immunophenotypic characteristics in 36 cases of LBL, including a single case of LBL with a surface immunoglobulin-positive B-cell phenotype. Three additional patients with LBL whose cells expressed monoclonal serum immunoglobulins are presented here. In addition, the neoplastic lymphocytes expressed several B-cell-associated antigens. The tumor cells in the single case tested were TdT-negative. Despite the unusual immunologic phenotype, the morphologic features in all three cases were characteristic of LBL. In addition to the previously reported single case, to the authors' knowledge these are the only reported cases of a previously unrecognized variant of LBL: surface immunoglobulin-positive, B-cell LBL.
authors.affiliation: James Irvine Center for the Study of Leukemia and Lymphoma, City of Hope National Medical Center, Duarte, California 91010.
authors.forename: R
authors.initials: R
authors.lastname: Stroup
authors.forename: K
authors.initials: K
authors.lastname: Sheibani
authors.forename: J L
authors.initials: JL
authors.lastname: Misset
authors.forename: A M
authors.initials: AM
authors.lastname: Szekely
authors.forename: G
authors.initials: G
authors.lastname: Tremblay
authors.forename: H
authors.initials: H
authors.lastname: Rappaport
mesh_terms: D000293:Adolescent; D000368:Aged; D005260:Female; D005803:Genes, Immunoglobulin; D005838:Genotype; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000235:genetics / Q000276:immunology* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011947:Receptors, Antigen, B-Cell / Q000032:analysis*
chemical_list: D011947:Receptors, Antigen, B-Cell