Which of the following is a common sign of a pneumothorax?

A common sign of a pneumothorax is a deviated trachea. This occurs due to the presence of air in the pleural space, which can lead to pressure imbalances that cause the trachea to shift towards the unaffected side. This deviation is an important clinical finding and indicates that there is an underlying respiratory issue requiring immediate attention.

Shortness of breath is indeed a symptom often associated with pneumothorax but is not as definitive as the structural sign of a tracheal deviation. Palpitations and dizziness may occur in numerous conditions but are not specific indicators of pneumothorax. Recognizing a deviated trachea during physical examination is critical for healthcare providers to diagnose and manage pneumothorax effectively.