Using transoesophageal echocardiography, large aortic masses were found to be rigidly attached to the aortic wall in two patients—in one patient the masses extended from the aortic arch to the descending aorta, while in the other patient the masses extended from the descending thoracic to the abdominal aorta. Intraluminal two dimensional ultrasound was then used to guide percutaneous biopsies of these …