Characterization of an expanded subpopulation of large granular lymphocytes in a patient with rheumatoid arthritis.

We describe a rheumatoid arthritis patient who was found to have chronic T cell lymphocytosis and neutropenia. She had an increased number of lymphocytes in the peripheral blood, bone marrow, and liver, and the expanded lymphocyte subset consisted of large granular lymphocytes with a homogeneous phenotype. Of the previously described patients with these large granular lymphocytes, almost one-fourth have had rheumatoid arthritis.