Quiz Page Answers March 2006

Plain x-ray of the stents with the humerus at 90°.

Fibers in the stents are fractured in 2 locations (arrows), which likely is an incidental finding. However, there is stenosis at the most proximal segment of the stent (arrowhead), which likely explains the clinical presentation.

Plain x-ray of the stents with the humerus abducted to 135°.

Fractures in the stents are evident, and the fibers are separated (arrows). This suggests that repetitive arm movement caused mechanical stress damage to the stent. The proximal stenosis is still visible (arrowhead).

X-ray of the stents after injection of radiocontrast.

Injection of radiocontrast shows aneurysms that have formed at the sites of stent fracture (arrows).