What aortic arch anomaly is present ?
Aberrent right subclavian artery - posterior to oesophagus
In view of the stenotic regions of the distal subclavian arteries and patient's age group, what would be an important diagnostic consideration?
Takayasu arteritis - type I
What is a key concern given the calibre of this aberrant subclavian artery ?
There is a high risk of spontaneous rupture (see references 3 and 4)
MR angiogram with gadolinium demonstrates an aberrant right subclavian artery (arrowed). Note normal loss of signal (flow void) due to blood changing direction within the descending aorta. Also, note the associated aneurysmal dilatation of this vessel.
Coronal MR angiogram further demonstrates the aberrant origin of the right subclavian artery. Incidental gallstone noted (arrowed).
3D rendered image demonstrates the aberrant subclavian anatomy. In addition, there is considerable pruning and stenoses with areas of occlusion involving the subclavian arteries more distally (arrowed).