Fig. 7
From: MDCT angiographic findings of various congenital pulmonary artery anomalies in pediatric patients
A 5-week-old baby with pulmonary artery aneurysm detected on echocardiography. a Axial CT shows the left pulmonary artery (LPA) arises from ascending aorta (AA) and marked aneurysmal dilatation of the right pulmonary artery (RPAA), left SVC noted (arrow). b The right ventricle (RV) gives off the right pulmonary artery (RPA) which shows aneurysmal dilatation (RPAA). c The four cardiac chambers illustrated along with right middle lobe (RML) collapse. d Airway and lung changes: the left (arrow) and right (arrowhead) main bronchi are compressed by the aberrant LPA and RPAA respectively. Due to RML collapse, there was compensatory hyperinflation of the right upper lobe that crossed the midline and herniated into the left side. e 2D Sagittal reformat image shows the origin of LPA from AA; both structures seen anterior to the RPAA