PMC8424655_01
(A) Axial and (B) sagittal computed tomography images of the chest showing consolidation
and subsegmental atelectasis in the right and left upper lobe, and consolidation and atelectasis,
with tubular bronchiectasis, in the apical regions of the lower lobe.
AJTCCM-24-4-221-fig1.jpg
PMC8424655_01_AJTCCM-24-4-221-fig1.jpg
F1
An uncontrasted computed tomography (CT) scan was performed, which revealed bronchopneumonic changes with collapse and consolidation (Fig. 1). 
Axial computed tomography angiogram demonstrating an
incomplete aortic sling noted as encasing both the trachea and
oesophagus, with an impression of a fibrotic band or incomplete arterial
communication in the quadrant between three o'clock and six o'clock.
AJTCCM-24-4-221-fig2.jpg
PMC8424655_01_AJTCCM-24-4-221-fig2.jpg
F2
This revealed a double aortic arch (DAA) vascular ring, with separate origins on the left and right common carotid and subclavian arteries as seen from the respective arms of the aortic sling (Fig. 2).
PMC8424655_02
Chest X-ray, showing poor visualisation of the airway and hyperinflation.
AJTCCM-24-4-221-fig3.jpg
PMC8424655_02_AJTCCM-24-4-221-fig3.jpg
F3
Review of his chest X-rays revealed significant narrowing of the airways and a structural anomaly was suspected (Fig. 3). 
Axial computed tomography chest image showing a complete aortic sling, which appears to encase the trachea and oesophagus.
AJTCCM-24-4-221-fig4.jpg
PMC8424655_02_AJTCCM-24-4-221-fig4.jpg
F4
 Chest CT revealed a DAA vascular ring encasing both the trachea and the oesophagus (Fig. 4).