Correct!
2. Frontal chest radiography shows an abnormal mediastinal contour
The frontal chest radiograph shows an abnormal contour along the left superior mediastinum- there is a convex leftward “bulge” cranial to the left heart border and left hilum (Figure 2).
Figure 2. Frontal chest radiography shows an abnormal contour (arrows) along the left superior mediastinum.
There are no pulmonary nodules, nor is there evidence of dependent pleural liquid. The hilar and peribronchial regions appear normal and no mediastinal lymph node enlargement is present. No cavitary lung mass is present.
Which of the following choices represents the most likely structure giving rise to the abnormal finding at chest radiography? (Click on the correct answer to proceed to the third of nine pages)