This article gives an overview of the aetiology, diagnostic evaluation
and treatment of pleural effusions. A systematic approach including r
adiological and sonographic examinations and pleural fluid analysis is
proposed with a view to selecting the most appropriate therapy. Commo
n forms of exudative pleural effusions are explained in detail. For co
mplicated para-pneumonic effusions, new therapeutic options such as th
e use of fibrinolytics or thoracoscopic debridement are discussed. Tal
c slurry and thoracoscopic talc poudrage provide effective methods for
pleurodesis in case of malignant effusions.