title: Lymphoid tumors displaying rearrangements of both immunoglobulin and T cell receptor genes.
abstract: Ig and T beta gene rearrangements can be used as genetic markers of lineage and clonality in the study of B and T cell populations. We have addressed the issue of the respective B and T lineage specificity of these rearrangements by analyzing a panel of 63 lymphoid tumors representative of the various clinicopathologic categories of both B and T neoplasias. We report that approximately 10% of the cases tested displayed rearrangements of both Ig and T beta genes. Despite their dual genotypic pattern, these tumors retain a pure immunophenotype, i.e. they display either B or T cell lineage-restricted cell surface antigens. The implications of these findings for both normal and neoplastic lymphoid differentiation are discussed.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000951:Antigens, Neoplasm / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis; D001402:B-Lymphocytes / Q000276:immunology; D004273:DNA, Neoplasm / Q000032:analysis; D005819:Genetic Markers; D005838:Genotype; D006801:Humans; D007938:Leukemia / Q000235:genetics / Q000276:immunology*; D008223:Lymphoma / Q000235:genetics / Q000276:immunology*; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*; D011971:Receptors, Immunologic / Q000235:genetics*; D012751:Sezary Syndrome / Q000235:genetics / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D004273:DNA, Neoplasm; D005819:Genetic Markers; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic