Parapneumonic effusions can be diagnosed in about 40 - 50 % of patients with bacterial pneumonia, and therefore should be considered as a frequent condition. Despite their prevalence, there is limited consensus about diagnostic pathways and therapeutic procedures due to the lack of evidence-based data available. The classification of parapneumonic effusions is based on morphological, chemical and bacteriological criteria. Dependent on the complexity of the effusion, available management approaches include observation without intervention, thoracentesis, chest tube drainage with or without local fibrinolysis and the surgical options VATS and thoracotomy. This overview summarizes the actual aspects of classification, diagnosis and treatment of the parapneumonic effusion and draws conclusions for the daily management of this condition.