Bronchopleural fistula is defined as an abnormal connection between which structures?

• A. An abnormal connection between a bronchus and the pleural space
• B. A buildup of fluid in the pleural space
• C. A fracture of the rib causing pneumothorax
• D. An infection that travels from the bronchus to the pleural space

Answer: (A)

An abnormal connection between a bronchus and the pleural space is what defines a bronchopleural fistula. This direct communication lets air pass from the airway into the pleural cavity, causing a persistent air leak and often pneumothorax, especially after lung surgery or trauma. The other scenarios describe different pleural problems: a buildup of fluid in the pleural space is a pleural effusion; a rib fracture causing pneumothorax is air in the pleural space without a bronchial connection; and an infection spreading from the bronchus to the pleural space may lead to empyema, but not a true fistulous tract. Thus, the essence is the abnormal bronchus-to-pleural space connection.