RESUMEN
We experienced a case of non-Hodgkin's lymphoma presented only as right side pleural effusion, that is primary effusion lymphoma (PEL), in a 75 year-old male patient in Korea where is the endemic area of tuberculosis. He visited our hospital complaining of exertional dyspnea. He did not have B symptoms. The breathing sound was decreased on the right side chest, but we could not find external lymphadenopathy or hepatosplenomegaly on physical examination. Simple chest radiograph showed right side pleural effusion. The cells of pleural fluid were lymphocyte-predominant and the pH, protein, lactate dehydrogenase, adenosine deaminase of the fluid was 7.31, 38 g/L, 381 U/L, 31 U/L, respectively. The biopsy specimen of the parietal pleura was diagnosed as non-Hodgkin's lymphoma of small lymphocytic type. Computed tomograph of the chest, abdomen and pelvis, and the biopsy of bone marrow were negative for disease. We tried up to 3 cycles of chemotherapy with adriamycin, vincristine, cyclophosphamide and prednisolone and there was a marked decrease in the amount of the pleural effusion.