Postoperative complications after lung resection necessitating rethoracotomy are rare. The most common early complication is hemorrhage. Reintervention is indicated if bloody secretion of more than 250 ml/h persists over a period of hours. Any large intrapleural hematoma should be removed to avoid infection or development of pleural callosity. Further indications for rethoracotomy are: persistent parenchyma fistula, pneumothorax, residual cavity, pleural empyema, leakage of the bronchial stump and mechanical bronchial obstruction.