Pulmonary Interstitial Emphysema

**Semantic type:** Disease or Syndrome

**Definition:** Pathologic accumulation of air in the interstitium of the lungs, which is caused by the rupture of alveoli and terminal bronchioles, and is most often seen in premature infants that need mechanical ventilation for respiratory distress syndrome.

**Synonyms:** - Interstitial Emphysema of Lung - PIE