Fig. 1

Surveillance computed tomography angiography coronal cuts from anterior to posterior (a–c, respectively). Arrows correspond to a chronic type B dissection involving the ostium of the left subclavian artery with aneurysmal degeneration to 5.3 cm. Distally, there is extension into the iliac bifurcation. There are multiple thoracic fenestrations, with all visceral vessels off the true lumen