Which description is most consistent with the emphysema phenotype?

Which description is most consistent with the emphysema phenotype?

• A. Thin
• B. Obesity
• C. Cyanosis
• D. Peripheral edema

Answer: (B)

Emphysema typically presents with a thin, cachectic appearance because the increased work of breathing and systemic energy demand lead to weight loss. This lean body habitus is sometimes described as a “pink puffer” due to relatively preserved color early on, despite using pursed-lip breathing to keep airways open. The key idea is that loss of elastic recoil and air trapping drive the breathing effort and energy expenditure, which over time reduces body mass. Obesity, cyanosis, and peripheral edema are more characteristic of the chronic bronchitis phenotype, often called the blue bloater, where mucus hypersecretion and hypoxemia contribute to a different clinical picture with fluid retention and weight gain.

Emphysema typically presents with a thin, cachectic appearance because the increased work of breathing and systemic energy demand lead to weight loss. This lean body habitus is sometimes described as a “pink puffer” due to relatively preserved color early on, despite using pursed-lip breathing to keep airways open. The key idea is that loss of elastic recoil and air trapping drive the breathing effort and energy expenditure, which over time reduces body mass.

Obesity, cyanosis, and peripheral edema are more characteristic of the chronic bronchitis phenotype, often called the blue bloater, where mucus hypersecretion and hypoxemia contribute to a different clinical picture with fluid retention and weight gain.