Immunoglobulin and T-cell receptor gene-gene rearrangement in pleural cavity-based T-cell rich B-cell lymphoma in an immunocompetent patient

Leukemia & Lymphoma
Anil PottiJohn Leitch

Abstract

Body cavity-based lymphomas are fluid-based lymphomas that are not associated with a tumor mass or adenopathy which could explain the origin of the lymphomatous effusion. A distinct lymphoma that grows in the body cavity as a lymphomatous effusion in the absence of a tumor mass has been identified as a primary effusion lymphoma. This almost exclusively occurs in patients with acquired immunodeficiency syndrome (AIDS), who invariably have a history of Kaposi sarcoma. We report a rare case of a recurrent pleural effusion in an immunocompetent patient. There was no evidence of lymphadenopathy or an associated mass on computerized tomography of the chest, abdomen and pelvis. Serology for HIV, HHS-8, EBV and HTLV-1 were negative. Cytologic examination of the pleural fluid showed an elevated white cell count with 97% lymphocytes, mostly with T-cell markers. Bone marrow aspirate and biopsy were negative and bronchoscopy was unrevealing. Pleural biopsy was significant for >70% T-lymphocytes and some large atypical cells. Which had CD19, CD20 and weak bcl-2 positivity. Kappa and lambda light chains did not show distinct clonality. A preliminary diagnosis of T-cell rich B-cell lymphoma (TCRBCL) of the pleural cavity was made. The diagnos...Continue Reading

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