Finally, there might a large, loculated pleural effusion caused by bacterial pneumonia or tuberculosis which may require surgery because it can thicken into a paste-like substance called an empyema which wouldn't drain easily through a tube.

最后，细菌性肺炎或肺结的大量多房性胸腔积需要手术治疗，因为积变浓稠成为类似浆糊的物质，称为脓胸，不易管引流。