Which signs indicate pneumothorax?

• A. Sudden chest pain with dyspnea and subcutaneous emphysema
• B. High fever, drooling, stridor, and tripod position in a child
• C. Cough, sore throat, and fatigue during flu season
• D. Cough, runny/stuffy nose, and sore throat

Answer: (A)

Pneumothorax presents as air entering the pleural space, which can cause the lung to collapse and trigger abrupt breathing discomfort. The most telling signs are sudden chest pain that worsens with breathing (pleuritic pain) and shortness of breath. When air leaks under the skin, it can produce subcutaneous emphysema, felt as a crackling sensation beneath the skin. This combination points to a chest air leak rather than a throat or airway problem.

The other scenarios describe conditions that affect the upper airway or an infectious illness rather than a pneumothorax. High fever with drooling and stridor, sometimes with a tripod stance, suggests an airway infection or obstruction. Cough with sore throat during flu season, or common cold-like symptoms with runny or congested nose, are typical of viral upper respiratory infections and do not inherently involve air in the pleural space or subcutaneous tissues.

So, the signs of sudden chest pain with dyspnea, and possibly subcutaneous emphysema, are the patterns most consistent with pneumothorax.