RT Journal A1 Weir AB, III, Herrod HG, Lester EP, Holbert J T1 DIffuse large-cell lymphoma of b-cell origin and deficient t-cell function in a patient with rheumatoid arthritis JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1989 FD July 1 VO 149 IS 7 SP 1688 OP 1690 DO 10.1001/archinte.1989.00390070188033 UL http://dx.doi.org/10.1001/archinte.1989.00390070188033 AB • An increased incidence of non-Hodgkin's lymphoma has been described in patients with rheumatoid arthritis. Mechanisms related to abnormal immune regulation have been postulated, but no patients with rheumatoid arthritis and lymphoma have been previously well characterized immunologically. We describe here a patient with long-standing rheumatoid arthritis in whom a B-cell diffuse large-cell lymphoma developed. He was found to have a severe T-cell immunodeficiency and evidence of persistent Epstein-Barr virus infection. Epstein-Barr nuclear antigen was not found to be present within lymphoma cells. The combination of defective T-cell function and persistent Epstein-Barr virus infection may have predisposed this patient with rheumatoid arthritis to the development of a malignant clone of B lymphocytes.(Arch Intern Med. 1989;149:1688-1690)