PMC9388932_01
Computed tomography of the chest showed that the right upper lung had enhanced transmittance due to the right tracheal bronchus' oppression (arrow).
fcvm-09-915111-g001.jpg
PMC9388932_01_fcvm-09-915111-g001.jpg
F1
Physical examination revealed hyperresonance in the right upper lung, and chest CT showed that the right upper lung had enhanced transmittance (Figure 1).
Computed tomography angiography [CTA, (A-C) horizontal, coronal, and sagittal] and [3-D reconstruction (D,E) front, back] show the right aortic arch (red arrow) and right ductus arteriosus (yellow arrow) with right tracheal bronchus (green arrow). The aorta and pulmonary artery are located in an anteroposterior relationship. In a normal conformation, even with the right aortic arch, the aorta is located to the right of the pulmonary artery. In addition, the left brachiocephalic artery and the right common carotid artery have a common trunk. This is the so-called bovine arch, a normal variant. The right tracheal bronchus, from the tracheal wall above the carina, runs in the "H"-shaped structure formed by the right aortic arch, right patent ductus, and right pulmonary artery.
fcvm-09-915111-g002.jpg
PMC9388932_01_fcvm-09-915111-g002.jpg
F2
On CTA, we found that the right aortic arch, right patent ductus arteriosus, and right pulmonary artery formed an "H-shaped" loop in conjunction with the right tracheal bronchus, which was "clamped" in it (Figure 2).