Systemic Arterial Supply to the Lung (Proximal Interruption of the Pulmonary Artery)
Radiologic Findings
Chest radiograph shows mass shadow in the left lower lobe. Chest CT scans show dilated vascular structure originated from descending thoracic aorta (arrows). Enlarged vascular structures are seen in the basal segment of left lower lobe.
Brief Discussion
Focal stenotic or atretic segment in PA
Opposite the aortic arch
Hypoplastic lung with decreased volume
Asymptomatic or hemoptysis
Right
Hypertrophied bronchial a.
Ascending aorta, aortic arch
Rt subclavian or innominate a.
Left
Descending aorta
Lt subclavian or innominate a.
Hypertrophied bronchial a.