Which group is spontaneous pneumothorax most commonly associated with?

• A. Tall, thin individuals
• B. Older adults with COPD
• C. Children with asthma
• D. Women with fibroids

Answer: (A)

Spontaneous pneumothorax happens when air enters the pleural space without any trauma, usually from rupture of small apical blebs in the lung. The group most commonly associated is tall, thin individuals, especially young men, because their lungs have larger apical regions where the intrapleural pressure is more negative and blebs are more prone to form and rupture. Smoking increases the risk, and this is classified as primary spontaneous pneumothorax in people without underlying lung disease. Other scenarios—older adults with COPD, which relates to secondary spontaneous pneumothorax from diseased lung tissue; children with asthma; or unrelated conditions like fibroids in women—do not represent the most common association for spontaneous pneumothorax.