What will be observed on a chest X-ray for a newborn with Transient Tachypnea of the Newborn (TTN)?

• A. Bilateral perihilar linear streaking
• B. Complete whiteout
• C. Clear lung fields
• D. Consolidation in one lung

Answer: (A)

Bilateral perihilar linear streaking observed on a chest X-ray for a newborn with Transient Tachypnea of the Newborn (TTN) is a characteristic finding associated with this condition. TTN is often caused by retained fetal lung fluid, which results in mild pulmonary edema. This fluid accumulation tends to collect around the hilum of the lungs, leading to the appearance of linear streaks on X-ray that are typically located in the perihilar regions.

These perihilar markings represent shimmering air bronchograms due to the small air-filled bronchial passages surrounded by fluid. This appearance is distinct from other conditions such as pneumonia or respiratory distress syndrome, where different patterns may be seen: complete whiteout suggests severe atelectasis or pulmonary consolidation, while clear lung fields indicate normal lung function. Consolidation typically appears as localized areas of opacity in one lung, which is not characteristic of the widespread nature of TTN. Thus, the presence of bilateral perihilar linear streaking is indicative of residual fluid dynamics associated with this transient condition.