Sarcoidosis is a disease characterized by the formation on noncaseating granulomas in several organs of the body (1). Recent attention has been directed to the study of pulmonary lymphocyte populations and their function. Whether the changes in the type and function of T lymphocytes in sarcoidosis are confined only to the lung parenchyma or are also found in other sites of granuloma formation has not been established. We report lymphocyte subpopulations in the pleural fluid of a patient with sarcoidosis and pleural involvement.
A 31-year-old woman had a 1-year history of progressive exertional dyspnea, dry cough, anosmia, intermittent right pleuritic