Which symptom is most characteristic of a tracheoesophageal fistula?

• A. Frequent coughing
• B. Difficulty swallowing
• C. Recurrent pneumonia
• D. Excessive drooling

Answer: (C)

A tracheoesophageal fistula (TEF) is an abnormal connection between the trachea and the esophagus that can lead to significant clinical symptoms. Recurrent pneumonia is a particularly characteristic symptom of this condition due to the aspiration of food, liquids, or saliva into the lungs, which can happen as a result of the abnormal connection.

In infants diagnosed with TEF, the aspiration of material can lead to repeated lung infections, manifesting as recurrent pneumonia. The presence of the fistula allows for gastrointestinal contents to enter the tracheobronchial tree, compromising lung health and increasing the risk of respiratory infections.

Frequent coughing, difficulty swallowing, and excessive drooling can be symptoms associated with TEF, but they are not as definitive for diagnosing the condition compared to recurrent pneumonia, which has a direct causal relationship with the fistula itself. The recurrent nature and the seriousness of pneumonia highlight the underlying pathophysiology resulting from the fistula, making it a critical symptom in identifying tracheoesophageal fistula.