A huge aortic arch aneurysm mimicking massive pulmonary artery embolism.

An 85-year-old man, who had previously undergone coronary bypass surgery, was subjected to a computed tomography (CT) scan because of an echocardiographic suspect of massive pulmonary embolism. A huge aortic arch aneurysm compressed the pulmonary arteries (Fig. 1). Sudden cardio-respiratory failure required mechanical ventilation. At this stage, surgeons considered him inoperable for high risk. He died of multi-organ failure.