Two Uncommon Radiographic Signs of an Anterior Neonatal Pneumothorax: Correlated with Clinical Finding

An anterior pneumothorax in a supine neonate is difficult to diagnose. A correlation was sought between radiographic signs of an anterior pneumothorax and clinical data to facilitate the radiographic diagnosis. A total of 817 consecutive admissions to two regional nurseries were reviewed, and infants with pneumothoraces were identified. Nineteen percent of these neonates had anterior pneumothoraces with Medial Stripe and Large Hyperlucent Hemithorax signs observed on the chest radiographs. The Medial Stripe sign was not associated with any distinguishing clinical features that would assist the physician in the interpretation of the radiograph. The Large Hyperlucent Hemithorax sign was noted predominantly on the left side in near-term infants who were breathing spontaneously. It was concluded that there are specific clinical variables associated with a Large Hyperlucent Hemithorax sign of an anterior pneumothorax in a supine neonate.