1. Hospital length of stay. This will be determined primarily by the primary attending physician based on the patient's medical condition. Patients will be considered 'pleurodesis fit for discharge' the day the chest tube is removed. The chest tube will be removed in the absence of pleural space infection or air-leak (i.e. complications) if the effusion drainage drops to ≤ 150 ml/day and if there is lung re-expansion.