Severity of Pectus Excavatum is a Risk Factor for Primary Spontaneous Pneumothorax.

Retrospective study of 514 pectus excavatum patients reveals that 26.5% develop pulmonary blebs, with Haller index >3.615 serving as a strong predictor for bleb formation and 9.8-fold increased risk of spontaneous pneumothorax. Findings suggest preoperative chest CT screening may identify high-risk patients before corrective surgery.