Lobar emphysema due to anomalous aortic origin of the left pulmonary artery.

The unusual case of an infant with aortic origin of the left pulmonary artery is presented. The patient developed a rare complication of lobar emphysema due to bronchial compression from the enlarged right pulmonary artery. Operative anastomosis of the left pulmonary artery to the pulmonary trunk was successful, with subsequent resolution of the lobar emphysema.