[An evaluation of lactic dehydrogenase and isoenzymes in the pleural fluid in tuberculous and malignant effusion].

In this article, we evaluated the usefulness of pleural fluid lactic dehydrogenase and isoenzymes in differential diagnosis of pleurisy. Lactic dehydrogenase activities and isoenzymes in pleural fluid were determined in twenty-five patients with tuberculosis and twenty-five patients with malignancy. The results showed that both lactic dehydrogenase level and isoenzymes in pleural fluid between two groups did not correlate significantly (P greater than 0.05).