[Approach to the evaluation and management of pleural effusions].

A pleural effusions arise as a complication of many different diseases basically they could be divided to: nonmalignant, malignant, and paramalignant effusions. This article is actually a review of etiological moments, pathogenesis, clinical presentation, the characteristics of pleural fluid, diagnosis, prognosis and treatment of pleural effusions. The aim of the article was to point to the clear principals which should be respected in situations of making the diagnosis, evaluation of prognosis and making plans for the treatment of pleural effusions, particular in cases of malignant pleural effusions.