Which category is a common cause of chylothorax?

Which category is a common cause of chylothorax?

• A. Cardiothoracic and esophageal surgeries
• B. Bacterial pneumonia
• C. Pulmonary edema
• D. Asthma

Answer: (A)

Chylothorax happens when chyle leaks into the pleural space due to damage or obstruction of the thoracic duct. The thoracic duct travels through the mediastinum and is especially at risk during procedures that involve the chest and esophagus. So, surgeries in the cardiothoracic and esophageal areas are a common iatrogenic cause of chylothorax. The other conditions listed don’t typically cause chyle leakage: bacterial pneumonia can lead to an infectious pleural effusion, but not with chyle; pulmonary edema produces a transudative fluid from heightened hydrostatic pressure; and asthma affects the airways, not the pleural lymphatics. If chylothorax is suspected, the pleural fluid often looks milky and has high triglycerides with chylomicrons, guiding management toward stopping the leak and draining the fluid, with surgical repair considered if needed.