[Pseudochylothorax during the course of rheumatoid arthritis]

Psudochylothorax is uncommon among pleural fluids. It can be observed during tuberculosis or rheumatoid arthritis in majority. A case of a 62 years old man with chronic pleural fluid is presented. Patient had rheumatoid arthritis diagnosed 40 years ago. For last 13 years symptomsless bilateral pleural fluid was observed. Antituberculous drugs were used without success. Plural fluid obtained after puncture had high level of cholesterol with it[symbol: see text]s crystals, without chylomikrons and triglycerides. Diagnosis of pseudochylothorax in the course of rheumatoid arthritis was established. After plural puncture fluid was removed and did not appear later. Differential diagnosis of pleural fluids is presented.