Which of the following is a presentation of COPD in the emphysema phenotype?

• A. Cyanosis
• B. Decreased breath sounds
• C. Obesity
• D. Rhonchi

Answer: (B)

Emphysema causes hyperinflated lungs with loss of elastic recoil, so air movement is reduced and breath sounds become quiet on examination. This diminished transmission of sounds—often described as a “quiet chest”—is a hallmark of the emphysema phenotype in COPD, reflecting air trapping and poor ventilation rather than mucus buildup or airway secretions.

Cyanosis tends to be more associated with chronic bronchitis due to more pronounced hypoxemia and mucus production; obesity is not typical for emphysema, where patients are often underweight from increased work of breathing; rhonchi indicate secretions in the airways, which are more characteristic of bronchitis. Therefore, decreased breath sounds best fits the emphysema phenotype.