title: Lymphoblastic lymphoma: an immunophenotype study of 26 cases with comparison to T cell acute lymphoblastic leukemia.
abstract: A series of 26 lymphoblastic lymphomas (LLs) and 13 T cell acute lymphoblastic leukemias (ALLs) were investigated using a battery of monoclonal antibodies applied to tissue frozen sections. Twenty-one of the LLs were of T lineage. All but one of the T cell LLs were of immature thymic phenotype, mostly corresponding to stage II cortical thymocyte development. The T cell LLs expressed Leu-1 in 100%, Leu-4 and Leu-9 in 95%, and Leu-5 in 85% of the cases. The high percentage of Leu-4 expression in this series is probably due to detection of cytoplasmic antigen with our methods. One LL was of pre-B or B cell and two cases were of common ALL phenotype. Two cases were of undefined phenotype, expressing markers of both B and T cell differentiation. Pediatric cases showed a greater tendency toward T cell phenotype than did adult cases. The cases of T cell ALL were immunophenotypically similar to the cases of T cell LL but showed a tendency toward a more immature phenotype.
authors.forename: L M
authors.initials: LM
authors.lastname: Weiss
authors.forename: J M
authors.initials: JM
authors.lastname: Bindl
authors.forename: V J
authors.initials: VJ
authors.lastname: Picozzi
authors.forename: M P
authors.initials: MP
authors.lastname: Link
authors.forename: R A
authors.initials: RA
authors.lastname: Warnke
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm / Q000032:analysis*; D000954:Antigens, Surface / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007945:Leukemia, Lymphoid / Q000276:immunology*; D008223:Lymphoma / Q000276:immunology*; D009182:Mycosis Fungoides / Q000276:immunology; D010641:Phenotype; D012878:Skin Neoplasms / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D000954:Antigens, Surface