Intraluminal mass of the ascending aorta.

A 53-year-old truck-driver, symptomatic for headache, was diagnosed [computed tomography (CT) and cardiac magnetic resonance imaging (cMRI)] with a 4 cm intraluminal aortic mass arising 3.5 cm above the sinu-tubular junction (Fig. 1A and B and Supplementary Video 1). After epiaortic ultrasound scanning (Fig. 2A and Supplementary Video 1), the ascending aorta was resected on femoral bypass, following a brief circulatory arrest before clamping. Pathology showed a thrombus on an ulcerated plaque (Fig. 2B).