Figure 7(A-C).

Pulmonary interstitial emphysema. (A) Frontal radiograph of the chest in a 30-week-old premature infant post surfactant therapy and positive pressure ventilation reveals bilateral cystic lucencies (arrows) and granular opacities (curved arrows) suggesting evolving pulmonary interstitial emphysema. (B) Another preterm infant with development of tubular bubbly lucencies in right lower zone with atelectasis (asterisk) in right upper zone. Note the malpositioned endotracheal tube in right main bronchus (dotted arrow). (C) A localized form of PIE with thin walled pseudocyst (asterisk), commonly seen in right parahilar regio