title: Immunocytometry and gene rearrangement analysis in the diagnosis of lymphoma in an idiopathic pleural effusion.
abstract: We report a patient with an idiopathic pleural effusion in whom the diagnosis of non-Hodgkin's lymphoma was established by immunocytometry of pleural fluid and confirmed by the detection of B-cell immunoglobulin gene rearrangement. Immunocytometry is a rapid, semi-automated laboratory method for phenotyping lymphoid cells by determining immunoglobulin and other cell surface antigen expression. This method defines the cell lineage (T or B cells) and the clonality (monoclonal or polyclonal) of a population of lymphocytes. The presence of a monoclonal population of lymphocytes can also be confirmed by recently developed molecular biologic techniques (e.g., Southern blotting) that provide the ability to detect rearrangements of the genes that encode either B-cell immunoglobulin proteins or T-cell antigen receptor proteins. To our knowledge, this case represents the first reported application of immunophenotypic and gene rearrangement analysis in a previously undiagnosed pleural effusion to establish the diagnosis of lymphoma. These relatively new laboratory methods may have a role in the evaluation of idiopathic lymphocytic pleural effusions.
authors.affiliation: Department of Pulmonary Disease, Cleveland Clinic Foundation, OH 44195-5038.
authors.forename: M S
authors.initials: MS
authors.lastname: Kavuru
authors.forename: R
authors.initials: R
authors.lastname: Tubbs
authors.forename: M L
authors.initials: ML
authors.lastname: Miller
authors.forename: H P
authors.initials: HP
authors.lastname: Wiedemann
mesh_terms: D000368:Aged; D001853:Bone Marrow / Q000473:pathology; D005260:Female; D015322:Gene Rearrangement, B-Lymphocyte; D006801:Humans; D016130:Immunophenotyping; D008168:Lung / Q000473:pathology; D016393:Lymphoma, B-Cell / Q000150:complications / Q000175:diagnosis* / Q000276:immunology / Q000473:pathology; D016066:Pleural Effusion, Malignant / Q000150:complications*