What is "pneumatocele"

Pneumatocele \Pneu*mat"o*cele\, n. [Pneumato- + Gr. ? a tumor; cf. F. pneumatoc[`e]le.] (Med.) A distention of the scrotum by air; also, hernia of the lungs.

n. 1 (context medicine English) a hernia or air-filled cyst within the lung 2 (context medicine English) a gaseous swelling, especially within the scrotum

A pneumatocele is a cavity in the lung parenchyma filled with air that may result from pulmonary trauma during mechanical ventilation.