1 The Montreal Children's Hospital, Montreal, Quebec, Canada
A case of pulmonary interstitial emphysema in a premature newborn infant with hyaline membrane disease is reported. The interstitial emphysema at first involved both lungs, then became localized to the left upper lobe. There was an associated pneumopericardium which resolved spontaneously. The increasing amount of air in the interstitium of the left upper lobe resulted in severe respiratory embarrassment which necessitated surgical removal at 29 days of age. Pathologic examination of the resected lobe showed chronic pulmonary interstitial emphysema and dilated, thick-walled lymphatic vessels.
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