This case demonstrates the finding of a right-sided aortic arch.

Learning points:

• right-sided aortic arch is an anatomical variant with the arch of the aorta traversing to the right of the trachea
• right-sided aortic arch is rare, occurring in ~0.1% of the general population
• CXR findings consistent with right-sided aortic arch include:
  • 'mass' in the right paratracheal region
  • absence of left aortic contour
  • left tracheal deviation at the aortic arch
  • presence of right-sided descending thoracic aorta