title: IgE lambda paraproteinaemia associated with a pleomorphic lymphoproliferative disorder.
abstract: A new case of IgE lambda paraproteinaemia is described in which the immunoproliferative disorder was lympho-plasmacytoid, rather than myelomatous in type. The patient, an 81-year-old woman, lacked both organomegaly and bone lesions. The peripheral white blood count was 30 X 10(9)/l (43% lymphocytes and 37% lymphoplasmacytoid cells) and the bone marrow was heavily infiltrated with mononuclear cells with 50% lymphocytes and 50% lymphoplasmacytoid cells). Detailed immunological marker analysis of both peripheral blood and marrow showed an increased population of morphologically normal T cells, together with neoplastic population of B cells. The neoplastic cells were shown to re-express surface immunoglobulin after stripping with anti-E anti-serum, and to synthesis Ig in radio-incorporation experiments. The immunological characteristics of the neoplastic cells are considered in relation to B-cell maturation and it is shown that the immunological phenotype was of the intermediate type to be expected in association with a lympho-plasmacytoid proliferation.
mesh_terms: D000367:Age Factors; D000368:Aged; D001773:Blood Cells / Q000648:ultrastructure; D001853:Bone Marrow / Q000648:ultrastructure; D001854:Bone Marrow Cells; D005260:Female; D006801:Humans; D007073:Immunoglobulin E / Q000096:biosynthesis; D008232:Lymphoproliferative Disorders / Q000097:blood / Q000150:complications* / Q000473:pathology; D010265:Paraproteinemias / Q000097:blood / Q000150:complications* / Q000473:pathology; D011947:Receptors, Antigen, B-Cell; D012397:Rosette Formation
chemical_list: D011947:Receptors, Antigen, B-Cell; D007073:Immunoglobulin E